The Experts below are selected from a list of 309 Experts worldwide ranked by ideXlab platform
Norihiko Tomooka - One of the best experts on this subject based on the ideXlab platform.
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Whole genome sequencing data of Vigna nakashimae var. Ukushima and G418
Data in brief, 2020Co-Authors: Eri Ogiso-tanaka, Takehisa Isemura, Alisa Kongjaimun, Akito Kaga, Ken Naito, Sompong Chankaew, Akiko Baba, Norihiko TomookaAbstract:Vigna nakashimae is one of the closely related species of Vigna angularis (Adzuki bean). Two strain of 'Ukushima' and 'G418' were identified as salt tolerance strains in Vigna nakashimae from gene bank collection. F2 populations from an inter- or intra-specific cross between the sensitive and tolerant strains are useful for the detection of salt tolerance QTL in Vigna nakashimae. Although Vigna angularis reference genome is available and useful for genetic analysis by genotyping-by-sequencing/RADseq in closely related species, it is not enough for isolation of responsible genes. To reveal sequence variation in Vigna nakashimae "Ukushima" and "G418", the whole genome sequencing was performed using Illumina HiSeq X Ten system (411,174,986 and 478,116,282 read). NGS data was deposited in the DNA Data Bank of Japan (DDBJ) under accession number DRA009307.
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Unique responses of three highly salt-tolerant wild Vigna species against salt stress
Plant Production Science, 2019Co-Authors: Junko Yoshida, Norihiko Tomooka, Thet Yee Khaing, P. G. Sunil Shantha, Hitoshi Naito, Yosuke Matsuda, Hiroshi EharaAbstract:The genus Vigna contains important crops such as cowpea and mungbean. Wild Vigna showing higher salt tolerance than Vigna crops were screened and their tolerance mechanisms are discussed. Primary s...
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construction of genetic linkage map and genome dissection of domestication related traits of moth bean Vigna aconitifolia a legume crop of arid areas
Molecular Genetics and Genomics, 2019Co-Authors: Chutintorn Yundaeng, Alisa Kongjaimun, Prakit Somta, Akito Kaga, Kitiya Amkul, Norihiko TomookaAbstract:The moth bean (Vigna aconitifolia), possibly the most primitive crop of the genus Vigna, is a highly drought- and heat-resistant legume grown in arid areas. Moth bean domestication involved phenotypic changes, including reduction of seed dormancy and pod shattering, increased organ size, and earlier flowering and maturity. However, the genetics of the domestication process in moth bean is not known. In this study, we constructed a genetic linkage map for moth bean and used the map to identify quantitative trait loci (QTL) for domestication-related traits of an F2 population of 188 individuals produced from a cross of wild moth bean (TN67) and cultivated moth bean (ICPMO056). The genetic linkage map comprised 11 linkage groups (LG) of 172 simple sequence repeat markers and spanned a total length of 1016.8 centiMorgan (cM), with an average marker distance of 7.34 cM. A comparative genome analysis showed high genome synteny between moth bean and mungbean (Vigna radiata), adzuki bean (Vigna angularis), rice bean (Vigna umbellata), and yardlong bean (Vigna unguiculata). In total, 50 QTLs and 3 genes associated with 20 domestication-related traits were identified. Most of the QTLs belonged to five LGs (1, 2, 4, 7, and 10). Key traits related to domestication such as seed dormancy and pod shattering were controlled by large-effect QTLs (PVE > 20%) with one or two minor QTLs, whereas all other traits were controlled by one–seven minor QTLs, apart from seed weight, which was controlled by one major and seven minor QTLs. These results suggest that a small number of mutations with large phenotypic effects have contributed to the domestication of the moth bean. Comparative analysis of QTLs with related Vigna crops revealed that there are several domestication-related large-effect QTLs that had not been used in moth bean domestication. This study provides a basic genetic map and identified genome regions associated with domestication-related traits, which will be useful for the genetic improvement of the moth bean and related Vigna species.
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Novel Genetic Resources in the Genus Vigna Unveiled from Gene Bank Accessions
PLOS ONE, 2016Co-Authors: Yu Takahashi, Prakit Somta, Chiaki Muto, Kohtaro Iseki, Ken Naito, M. Pandiyan, Senthil Natesan, Norihiko TomookaAbstract:The genus Vigna (Fabaceae) consists of five subgenera, and includes more than 100 wild species. In Vigna, 10 crops have been domesticated from three subgenera, Vigna, Plectrotropis, and Ceratotropis. The habitats of wild Vigna species are so diverse that their genomes could harbor various genes responsible for environmental stress adaptation, which could lead to innovations in agriculture. Since some of the gene bank Vigna accessions were unidentified and they seemed to be novel genetic resources, these accessions were identified based on morphological traits. The phylogenetic positions were estimated based on the DNA sequences of nuclear rDNA-ITS and chloroplast atpB-rbcL spacer regions. Based on the results, the potential usefulness of the recently described species V. indica and V. sahyadriana, and some wild Vigna species, i.e., V. aconitifolia, V. dalzelliana, V. khandalensis, V. marina var. oblonga, and V. vexillata, was discussed.
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Evolution, domestication and neo-domestication of the genus Vigna
Plant Genetic Resources, 2014Co-Authors: Norihiko Tomooka, Takehisa Isemura, Akito Kaga, Kohtaro Iseki, Ken Naito, Hiroaki Sakai, Eri Ogiso-tanaka, Yu TakahashiAbstract:In this paper, we discuss stress-adapted wild Vigna plants and several important Vigna crops. Seeds, young shoots and/or tubers of many wild Vigna species are edible and are eaten by people in some locations where they grow. We propose the concept of ‘neo-domestication’ of stress-adapted wild edible Vigna species. As the causative change of the mutation resulting in a domestication gene is usually ‘loss-of-function’ type, ‘neo-domestication’ could be achieved by conventional mutation breeding together with screening by TILLING. The ‘neo-crops’ could play an important role in areas unsuitable for growing other crops to increase world food production. We also propose that wild Vigna species can be ‘new model plant species’ for the genetic study of natural adaptation to stresses (e.g. salt, acid, alkali, drought, flood, pests and diseases). To facilitate this, the Vigna Genome Project has been initiated. In addition, sustainable cropping systems may be enhanced by analysis of the nitrogen-fixing systems of stress-adapted Vigna species. Stress-adapted symbiotic bacteria produce nodules on stress-adapted Vigna species. Therefore, analyses of the genetic diversity of symbiotic bacteria and the process of symbiosis under stress environments should be conducted.
Prakit Somta - One of the best experts on this subject based on the ideXlab platform.
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construction of genetic linkage map and genome dissection of domestication related traits of moth bean Vigna aconitifolia a legume crop of arid areas
Molecular Genetics and Genomics, 2019Co-Authors: Chutintorn Yundaeng, Alisa Kongjaimun, Prakit Somta, Akito Kaga, Kitiya Amkul, Norihiko TomookaAbstract:The moth bean (Vigna aconitifolia), possibly the most primitive crop of the genus Vigna, is a highly drought- and heat-resistant legume grown in arid areas. Moth bean domestication involved phenotypic changes, including reduction of seed dormancy and pod shattering, increased organ size, and earlier flowering and maturity. However, the genetics of the domestication process in moth bean is not known. In this study, we constructed a genetic linkage map for moth bean and used the map to identify quantitative trait loci (QTL) for domestication-related traits of an F2 population of 188 individuals produced from a cross of wild moth bean (TN67) and cultivated moth bean (ICPMO056). The genetic linkage map comprised 11 linkage groups (LG) of 172 simple sequence repeat markers and spanned a total length of 1016.8 centiMorgan (cM), with an average marker distance of 7.34 cM. A comparative genome analysis showed high genome synteny between moth bean and mungbean (Vigna radiata), adzuki bean (Vigna angularis), rice bean (Vigna umbellata), and yardlong bean (Vigna unguiculata). In total, 50 QTLs and 3 genes associated with 20 domestication-related traits were identified. Most of the QTLs belonged to five LGs (1, 2, 4, 7, and 10). Key traits related to domestication such as seed dormancy and pod shattering were controlled by large-effect QTLs (PVE > 20%) with one or two minor QTLs, whereas all other traits were controlled by one–seven minor QTLs, apart from seed weight, which was controlled by one major and seven minor QTLs. These results suggest that a small number of mutations with large phenotypic effects have contributed to the domestication of the moth bean. Comparative analysis of QTLs with related Vigna crops revealed that there are several domestication-related large-effect QTLs that had not been used in moth bean domestication. This study provides a basic genetic map and identified genome regions associated with domestication-related traits, which will be useful for the genetic improvement of the moth bean and related Vigna species.
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Novel Genetic Resources in the Genus Vigna Unveiled from Gene Bank Accessions
PLOS ONE, 2016Co-Authors: Yu Takahashi, Prakit Somta, Chiaki Muto, Kohtaro Iseki, Ken Naito, M. Pandiyan, Senthil Natesan, Norihiko TomookaAbstract:The genus Vigna (Fabaceae) consists of five subgenera, and includes more than 100 wild species. In Vigna, 10 crops have been domesticated from three subgenera, Vigna, Plectrotropis, and Ceratotropis. The habitats of wild Vigna species are so diverse that their genomes could harbor various genes responsible for environmental stress adaptation, which could lead to innovations in agriculture. Since some of the gene bank Vigna accessions were unidentified and they seemed to be novel genetic resources, these accessions were identified based on morphological traits. The phylogenetic positions were estimated based on the DNA sequences of nuclear rDNA-ITS and chloroplast atpB-rbcL spacer regions. Based on the results, the potential usefulness of the recently described species V. indica and V. sahyadriana, and some wild Vigna species, i.e., V. aconitifolia, V. dalzelliana, V. khandalensis, V. marina var. oblonga, and V. vexillata, was discussed.
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an ssr based linkage map of yardlong bean Vigna unguiculata l walp subsp unguiculata sesquipedalis group and qtl analysis of pod length
Genome, 2012Co-Authors: Alisa Kongjaimun, Takehisa Isemura, Prakit Somta, Takehiko Shimizu, Akito Kaga, Norihiko Tomooka, Duncan A. Vaughan, Peerasak SrinivesAbstract:Yardlong bean (Vigna unguiculata (L.) Walp. subsp. unguiculata Sesquipedalis Group) (2n = 2x = 22) is one of the most important vegetable legumes of Asia. The objectives of this study were to develop a genetic linkage map of yardlong bean using SSR makers from related Vigna species and to identify QTLs for pod length. The map was constructed from 226 simple sequence repeat (SSR) markers from cowpea (Vigna unguiculata (L.) Walp. subsp. unguiculata Unguiculata Group), azuki bean (Vigna angularis (Willd.) Ohwi & Ohashi), and mungbean (Vigna radiata (L.) Wilczek) in a BC1F1 ((JP81610 × TVnu457) × JP81610) population derived from the cross between yardlong bean accession JP81610 and wild cowpea (Vigna unguiculata subsp. unguiculata var. spontanea) accession TVnu457. The markers were clustered into 11 linkage groups (LGs) spanning 852.4 cM in total length with a mean distance between adjacent markers of 3.96 cM. All markers on LG11 showed segregation distortion towards the homozygous yardlong bean JP81610 genot...
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ssr map construction and quantitative trait loci qtl identification of major agronomic traits in mungbean Vigna radiata l wilczek
Sabrao Journal of Breeding and Genetics, 2012Co-Authors: Tanaporn Kajonphol, Prakit Somta, Chontira Sangsiri, Theerayut Toojinda, Peerasak SrinivesAbstract:SUMMARY Mungbean (Vigna radiata) (2n : 2x: 22) is an important annual legume in Asia' It is widely grown in South and Southeast Asia, as well as China. The aim of this research was to use SSR markers to construct a linkage map and identiff chromosome regions controlling some agronomic traits in mungbean. The mapping population comprised 186 F2 plants derived from a cross between an annual cultivated mungbean line 'KUML29-I-3' (Vigna radiata var. radiata) and an Australian wild perennial mungbean accession 'W021' (Vigna radiata var. sublobqta). A total of 150 SSR primers were composed into I I linkage groups, each containing at least 5 markers. The map spans 1,174.2 cM with the average distance between the adjacent markers of 7.8 cM. Comparing the mungbean map with azuki bean (Vigna angularis) and blackgram (Vigna mungo) linkage maps revealed extensive genome conservation between the three species. Twenty QTLs controlling major agronomic characters includingdays to fust flower (FLD), days to first pod maturity (PDDM), days to harvest (PDDH), 100 seed weight (SDl00WT), number of seeds per pod (SDNPPD) and pod length (PDL) were located on to the linkage map. Most of the QTLs were located on linkage groups 7 and 5.
Akito Kaga - One of the best experts on this subject based on the ideXlab platform.
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Whole genome sequencing data of Vigna nakashimae var. Ukushima and G418
Data in brief, 2020Co-Authors: Eri Ogiso-tanaka, Takehisa Isemura, Alisa Kongjaimun, Akito Kaga, Ken Naito, Sompong Chankaew, Akiko Baba, Norihiko TomookaAbstract:Vigna nakashimae is one of the closely related species of Vigna angularis (Adzuki bean). Two strain of 'Ukushima' and 'G418' were identified as salt tolerance strains in Vigna nakashimae from gene bank collection. F2 populations from an inter- or intra-specific cross between the sensitive and tolerant strains are useful for the detection of salt tolerance QTL in Vigna nakashimae. Although Vigna angularis reference genome is available and useful for genetic analysis by genotyping-by-sequencing/RADseq in closely related species, it is not enough for isolation of responsible genes. To reveal sequence variation in Vigna nakashimae "Ukushima" and "G418", the whole genome sequencing was performed using Illumina HiSeq X Ten system (411,174,986 and 478,116,282 read). NGS data was deposited in the DNA Data Bank of Japan (DDBJ) under accession number DRA009307.
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construction of genetic linkage map and genome dissection of domestication related traits of moth bean Vigna aconitifolia a legume crop of arid areas
Molecular Genetics and Genomics, 2019Co-Authors: Chutintorn Yundaeng, Alisa Kongjaimun, Prakit Somta, Akito Kaga, Kitiya Amkul, Norihiko TomookaAbstract:The moth bean (Vigna aconitifolia), possibly the most primitive crop of the genus Vigna, is a highly drought- and heat-resistant legume grown in arid areas. Moth bean domestication involved phenotypic changes, including reduction of seed dormancy and pod shattering, increased organ size, and earlier flowering and maturity. However, the genetics of the domestication process in moth bean is not known. In this study, we constructed a genetic linkage map for moth bean and used the map to identify quantitative trait loci (QTL) for domestication-related traits of an F2 population of 188 individuals produced from a cross of wild moth bean (TN67) and cultivated moth bean (ICPMO056). The genetic linkage map comprised 11 linkage groups (LG) of 172 simple sequence repeat markers and spanned a total length of 1016.8 centiMorgan (cM), with an average marker distance of 7.34 cM. A comparative genome analysis showed high genome synteny between moth bean and mungbean (Vigna radiata), adzuki bean (Vigna angularis), rice bean (Vigna umbellata), and yardlong bean (Vigna unguiculata). In total, 50 QTLs and 3 genes associated with 20 domestication-related traits were identified. Most of the QTLs belonged to five LGs (1, 2, 4, 7, and 10). Key traits related to domestication such as seed dormancy and pod shattering were controlled by large-effect QTLs (PVE > 20%) with one or two minor QTLs, whereas all other traits were controlled by one–seven minor QTLs, apart from seed weight, which was controlled by one major and seven minor QTLs. These results suggest that a small number of mutations with large phenotypic effects have contributed to the domestication of the moth bean. Comparative analysis of QTLs with related Vigna crops revealed that there are several domestication-related large-effect QTLs that had not been used in moth bean domestication. This study provides a basic genetic map and identified genome regions associated with domestication-related traits, which will be useful for the genetic improvement of the moth bean and related Vigna species.
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Evolution, domestication and neo-domestication of the genus Vigna
Plant Genetic Resources, 2014Co-Authors: Norihiko Tomooka, Takehisa Isemura, Akito Kaga, Kohtaro Iseki, Ken Naito, Hiroaki Sakai, Eri Ogiso-tanaka, Yu TakahashiAbstract:In this paper, we discuss stress-adapted wild Vigna plants and several important Vigna crops. Seeds, young shoots and/or tubers of many wild Vigna species are edible and are eaten by people in some locations where they grow. We propose the concept of ‘neo-domestication’ of stress-adapted wild edible Vigna species. As the causative change of the mutation resulting in a domestication gene is usually ‘loss-of-function’ type, ‘neo-domestication’ could be achieved by conventional mutation breeding together with screening by TILLING. The ‘neo-crops’ could play an important role in areas unsuitable for growing other crops to increase world food production. We also propose that wild Vigna species can be ‘new model plant species’ for the genetic study of natural adaptation to stresses (e.g. salt, acid, alkali, drought, flood, pests and diseases). To facilitate this, the Vigna Genome Project has been initiated. In addition, sustainable cropping systems may be enhanced by analysis of the nitrogen-fixing systems of stress-adapted Vigna species. Stress-adapted symbiotic bacteria produce nodules on stress-adapted Vigna species. Therefore, analyses of the genetic diversity of symbiotic bacteria and the process of symbiosis under stress environments should be conducted.
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an ssr based linkage map of yardlong bean Vigna unguiculata l walp subsp unguiculata sesquipedalis group and qtl analysis of pod length
Genome, 2012Co-Authors: Alisa Kongjaimun, Takehisa Isemura, Prakit Somta, Takehiko Shimizu, Akito Kaga, Norihiko Tomooka, Duncan A. Vaughan, Peerasak SrinivesAbstract:Yardlong bean (Vigna unguiculata (L.) Walp. subsp. unguiculata Sesquipedalis Group) (2n = 2x = 22) is one of the most important vegetable legumes of Asia. The objectives of this study were to develop a genetic linkage map of yardlong bean using SSR makers from related Vigna species and to identify QTLs for pod length. The map was constructed from 226 simple sequence repeat (SSR) markers from cowpea (Vigna unguiculata (L.) Walp. subsp. unguiculata Unguiculata Group), azuki bean (Vigna angularis (Willd.) Ohwi & Ohashi), and mungbean (Vigna radiata (L.) Wilczek) in a BC1F1 ((JP81610 × TVnu457) × JP81610) population derived from the cross between yardlong bean accession JP81610 and wild cowpea (Vigna unguiculata subsp. unguiculata var. spontanea) accession TVnu457. The markers were clustered into 11 linkage groups (LGs) spanning 852.4 cM in total length with a mean distance between adjacent markers of 3.96 cM. All markers on LG11 showed segregation distortion towards the homozygous yardlong bean JP81610 genot...
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Genetic Diversity of the Vigna Germplasm from Thailand and Neighboring Regions Revealed by AFLP Analysis
Genetic Resources and Crop Evolution, 2006Co-Authors: Worapa Seehalak, Akito Kaga, Norihiko Tomooka, Aree Waranyuwat, Piyada Thipyapong, Paisan Laosuwan, Duncan A. VaughanAbstract:Thailand is a center of diversity for section Angulares of the Asian Vigna (genus Vigna subgenus Ceratotropis) and 4 Vigna species are cultivated in Thailand. Using newly collected wild and cultivated germplasm of Vigna from Thailand and outgroup accessions AFLP analysis was conducted to clarify genetic diversity and relationships. The results suggest that cultivated V. umbellata and V. mungo evolved from wild relatives in a single domestication event. Vigna umbellata is poorly differentiated from its wild and weedy relatives compared to V. mungo. Results suggest northern Thailand and the neighboring Shan state, Myanmar, is the probable center of domestication for V. umbellata as wild accessions from this area and cultivated rice bean from a wide area in Asia are not greatly diverged. Vigna minima, V. tenuicaulis and V. exilis accessions in Thailand are well differentiated with considerable intra-specific variation. Vigna hirtella consists of two well differentiated subgroups, suggesting taxonomic revision may be necessary. Close genetic relationships between V. radiata and V. grandiflora, and between V. mungo and V. trinervia are confirmed. Naturally growing V. mungo populations in northern Thailand appear to be true wild species as they are well differentiated from Indian wild and Thai cultivated populations. The origin of naturally growing cowpea in Thailand needs to be further studied using a more comprehensive set of materials. This study clarifies inter and intra-specific genetic diversity and inter species relationships of Thai Vigna species.
Alisa Kongjaimun - One of the best experts on this subject based on the ideXlab platform.
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Whole genome sequencing data of Vigna nakashimae var. Ukushima and G418
Data in brief, 2020Co-Authors: Eri Ogiso-tanaka, Takehisa Isemura, Alisa Kongjaimun, Akito Kaga, Ken Naito, Sompong Chankaew, Akiko Baba, Norihiko TomookaAbstract:Vigna nakashimae is one of the closely related species of Vigna angularis (Adzuki bean). Two strain of 'Ukushima' and 'G418' were identified as salt tolerance strains in Vigna nakashimae from gene bank collection. F2 populations from an inter- or intra-specific cross between the sensitive and tolerant strains are useful for the detection of salt tolerance QTL in Vigna nakashimae. Although Vigna angularis reference genome is available and useful for genetic analysis by genotyping-by-sequencing/RADseq in closely related species, it is not enough for isolation of responsible genes. To reveal sequence variation in Vigna nakashimae "Ukushima" and "G418", the whole genome sequencing was performed using Illumina HiSeq X Ten system (411,174,986 and 478,116,282 read). NGS data was deposited in the DNA Data Bank of Japan (DDBJ) under accession number DRA009307.
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construction of genetic linkage map and genome dissection of domestication related traits of moth bean Vigna aconitifolia a legume crop of arid areas
Molecular Genetics and Genomics, 2019Co-Authors: Chutintorn Yundaeng, Alisa Kongjaimun, Prakit Somta, Akito Kaga, Kitiya Amkul, Norihiko TomookaAbstract:The moth bean (Vigna aconitifolia), possibly the most primitive crop of the genus Vigna, is a highly drought- and heat-resistant legume grown in arid areas. Moth bean domestication involved phenotypic changes, including reduction of seed dormancy and pod shattering, increased organ size, and earlier flowering and maturity. However, the genetics of the domestication process in moth bean is not known. In this study, we constructed a genetic linkage map for moth bean and used the map to identify quantitative trait loci (QTL) for domestication-related traits of an F2 population of 188 individuals produced from a cross of wild moth bean (TN67) and cultivated moth bean (ICPMO056). The genetic linkage map comprised 11 linkage groups (LG) of 172 simple sequence repeat markers and spanned a total length of 1016.8 centiMorgan (cM), with an average marker distance of 7.34 cM. A comparative genome analysis showed high genome synteny between moth bean and mungbean (Vigna radiata), adzuki bean (Vigna angularis), rice bean (Vigna umbellata), and yardlong bean (Vigna unguiculata). In total, 50 QTLs and 3 genes associated with 20 domestication-related traits were identified. Most of the QTLs belonged to five LGs (1, 2, 4, 7, and 10). Key traits related to domestication such as seed dormancy and pod shattering were controlled by large-effect QTLs (PVE > 20%) with one or two minor QTLs, whereas all other traits were controlled by one–seven minor QTLs, apart from seed weight, which was controlled by one major and seven minor QTLs. These results suggest that a small number of mutations with large phenotypic effects have contributed to the domestication of the moth bean. Comparative analysis of QTLs with related Vigna crops revealed that there are several domestication-related large-effect QTLs that had not been used in moth bean domestication. This study provides a basic genetic map and identified genome regions associated with domestication-related traits, which will be useful for the genetic improvement of the moth bean and related Vigna species.
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an ssr based linkage map of yardlong bean Vigna unguiculata l walp subsp unguiculata sesquipedalis group and qtl analysis of pod length
Genome, 2012Co-Authors: Alisa Kongjaimun, Takehisa Isemura, Prakit Somta, Takehiko Shimizu, Akito Kaga, Norihiko Tomooka, Duncan A. Vaughan, Peerasak SrinivesAbstract:Yardlong bean (Vigna unguiculata (L.) Walp. subsp. unguiculata Sesquipedalis Group) (2n = 2x = 22) is one of the most important vegetable legumes of Asia. The objectives of this study were to develop a genetic linkage map of yardlong bean using SSR makers from related Vigna species and to identify QTLs for pod length. The map was constructed from 226 simple sequence repeat (SSR) markers from cowpea (Vigna unguiculata (L.) Walp. subsp. unguiculata Unguiculata Group), azuki bean (Vigna angularis (Willd.) Ohwi & Ohashi), and mungbean (Vigna radiata (L.) Wilczek) in a BC1F1 ((JP81610 × TVnu457) × JP81610) population derived from the cross between yardlong bean accession JP81610 and wild cowpea (Vigna unguiculata subsp. unguiculata var. spontanea) accession TVnu457. The markers were clustered into 11 linkage groups (LGs) spanning 852.4 cM in total length with a mean distance between adjacent markers of 3.96 cM. All markers on LG11 showed segregation distortion towards the homozygous yardlong bean JP81610 genot...
Maria M. Romeiras - One of the best experts on this subject based on the ideXlab platform.
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Conservation priorities for African Vigna species: Unveiling Angola’s diversity hotspots
Global Ecology and Conservation, 2021Co-Authors: Silvia Catarino, Josefa Rangel, Iain Darbyshire, Esperança Costa, Maria Cristina Duarte, Maria M. RomeirasAbstract:Abstract It is widely recognized that the conservation of the Crop Wild Relatives (CWR) in their wild habitats is fundamental to ensure the continuous supply of novel genetic material, crucial for future crop improvement. Vigna unguiculata (cowpea) and V. subterranea (bambara groundnut) are amongst the most significant African legumes as sources of food and fodder. In this study we investigated the diversity of Vigna species in Angola, to identify hotspot areas for their in situ conservation, and thus underpin future food security in Sub-Saharan Africa. Based on four criteria (i.e. potential utilization for crop improvement, threat status, ethnobotanical value, and geographical distribution) we prioritize Vigna CWR for conservation actions in Angola. Our results reveal that 28 Vigna species occur in Angola, two of which are endemic (V. mendesii and V. ramanniana). These species are unevenly distributed across the country, with greater dominance in the central-north and western areas, where four hotspot areas (Saurimo, Serra da Chela, N’dalatando, and Huambo) are identified. However, significant gaps in the current in situ conservation strategies are highlighted by our results, since the CWR diversity hotspots remain unprotected and only nine of the 28 Vigna species are recorded in protected areas. Moreover, in light of the fact that only one accession of Vigna collected in Angola exists in genebanks globally at present, we recommend a targeted seed collecting programme to support future management and ex situ conservation of plant genetic resources in Angola. Our study calls attention to the fact that Angola, together with Zambia, has the highest Vigna species richness in Sub-Saharan Africa, and provides new data and tools for the sustainable use of these species in crop improvement.
