The Experts below are selected from a list of 87 Experts worldwide ranked by ideXlab platform
- Icrisat - One of the best experts on this subject based on the ideXlab platform.
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Groundnut Elite Germplasm ICGV-SM 86715
International Crops Research Institute for the Semi-Arid Tropics, 1997Co-Authors: - IcrisatAbstract:ICGV-SM86715 is a high yielding Virginia-type groundnut (Arachis hypogaea) interspecific backcross derived from (Samaru 38 × A. chacoense) × Samaru 61. It was released as Veronica in Mauritius in 1992, and also performed well in Malawi, Swaziland and Niger. In trials conducted at 3 locations in Mauritius, pod yields of 2.4-4.7 t/ha were recorded, corresponding to an increase of 65 and 24% over Cabri and DHT200, respectively. ICGV-SM86715 is resistant to rust [Puccinia arachidis] and late leaf spot [Mycosphaerella berkeleyi] in Mauritius and Swaziland and is only slightly susceptible to pepper spot [Leptosphaerulina crassiasca]. It has a growth period of 111-159 days, a 100-seed weight of 57 g and an average shelling percentage of 64%. Oil content of seeds is about 48%
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Groundnut Variety ICGS 114
International Crops Research Institute for the Semi-Arid Tropics, 1993Co-Authors: - IcrisatAbstract:Arachis hypogaea cv. ICGS114 was selected from a 3-way cross between the Indian cultivars GAUG1 and Kadiri 3 and the introduced germplasm line NC Ac17090, which is resistant to rust (Puccinia arachidis) and tolerant of late leaf spot (Phaeoisariopsis personata [Mycosphaerella berkeleyi]). It was released in Ghana in 1989 as Sinkarzei. In trials during the 1986-89 rainy seasons, it had a similar seed yield to the local cultivar, F-mix, but matured 2 weeks earlier and had a greater shelling percentage and 100-seed weight. It has deep red seeds with 45% oil and is moderately resistant to jassids in India
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Groundnut Variety ICGV 86590
International Crops Research Institute for the Semi-Arid Tropics, 1992Co-Authors: - IcrisatAbstract:This variety was released in 1991 for low input, rainfed cultivation in Andhra Pradesh, Karnataka, Kerala, Maharashtra and Tamil Nadu, India, where rust (Puccinia arachidis) and late leaf spot (Phaeoisariopsis personata [Mycosphaerella berkeleyi]) cause significant pod yield losses. It was derived from a cross of X14-4-B-19-B (Spanish) and the rust- and late leaf spot-resistant Valencia germplasm line PI259747. It has shown 22% pod yield and 14% seed-yield advantages over the national control cultivar JL24, and outyielded other local cultivars in trials during 1988-90. ICGV86590 has shown resistance to Sclerotium [Corticium] rolfsii and Spodoptera litura. Maturation in the rainy season takes 96-123 days. Shelling turnover is 65%. The tan-coloured seeds contain 48% oil
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Groundnut Elite Germplasm ICGV 87157 [ICG (FDRS) 4]
International Crops Research Institute for the Semi-Arid Tropics, 1991Co-Authors: - IcrisatAbstract:This germplasm line is adapted to low-input rainfed areas where rust (Puccinia arachidis) and late leaf spot (Mycosphaerella berkeleyi) are problems. It originated from a single plant selection in an F3 population of a cross between the Spanish type variety Argentine and the rust and late leaf spot resistant PI259747. It possesses resistance to many diseases including Sclerotium [Corticium] rolfsii, and insect pests. It consistently outyielded the popular Indian cultivars JL24, TMV2 and J11 in trials during 1983-85. Growth period is over 110 days (rainy season). Recovery from mid-season drought is good, and shelling turnover is 64%. The tan-coloured seeds contain 48% oil and 28% protein
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Groundnut Variety ICGV 87160 [ICG(FDRS) 10]
International Crops Research Institute for the Semi-Arid Tropics, 1991Co-Authors: - IcrisatAbstract:Developed for low-input rainfed cultivation in Andhra Pradesh, Karnataka and Maharashtra, India, where rust (Puccinia arachidis) and late leaf spot (Mycosphaerella berkeleyi) are problematic, this variety was derived by the bulk pedigree method from a cross between Ah65 and NC Ac 17090, a rust resistant Valencia germplasm line. Pod yield is superior to that of local cultivars in many countries, including Sri Lanka were it yielded 100% more than the local cultivar. It has shown resistance to Sclerotium [Corticium] rolfsii and good tolerance of drought stress. Growth period is over 115 days in the rainy season. Shelling turnover is 67%. The tan-coloured seeds contain 48% oil and 27% protein
F Waliyar - One of the best experts on this subject based on the ideXlab platform.
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Genotype and environmental effects on resistance to late leafspot in groundnut
African Crop Science Journal, 1999Co-Authors: B R Ntare, F WaliyarAbstract:In 1995 and 1996, 15 advanced breeding lines of groundnuts along with a local check were evaluated in a replicated trial for yield and reaction to late leafspot (Cercosporidium personatum [Mycosphaerella berkeleyi]) at Gaya in Niger and Bagauda in Nigeria. Variation among locations within years was significant for pod yield and late leafspot as well as among genotypes. The genotype×year interaction variance for late leafspot was one-fifth the magnitude of the genetic variance while genotype×location variance was larger that the genetic variance. The genotype×year×location variance was two-thirds the magnitude of the genetic variance. Broad-sense heritability was low for pod yield (46%), high for seed weight (84%) and shelling percentage (86%) and intermediate for late leafspot (53%). The results indicated the need to test breeding lines for resistance to late leafspot in more years and locations. High yielding late leafspot resistant lines were found
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An improved field screening technique for resistance to rust and late leaf spot diseases in groundnut (1)
1991Co-Authors: F Waliyar, D. McdonaldAbstract:Field screening of germplasm lines at the ICRISAT Center, Patancheru, India, is done under high disease pressure from Puccinia arachidis and Phaeoisariopsis personata [Mycosphaerella berkeleyi]. Problems were encountered in disease scoring when both diseases are severe. A technique is described using selective fungicides to screen groundnut genotypes for each disease individually under these conditions of multiple disease pressure
D. Mcdonald - One of the best experts on this subject based on the ideXlab platform.
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Registration of ICGV 86699 peanut germplasm line with multiple disease and insect resistance
Crop Science, 1996Co-Authors: L J Reddy, P. Subrahmanyam, D. Mcdonald, J. P. Moss, Shyam N. Nigam, A. K. Singh, A G S ReddyAbstract:This high-yielding elite groundnut (Arachis hypogaea subsp. hypogaea var. hypogaea) germplasm line, released in 1994 and developed from a single-plant selection made in CS29 (A. batizocoi/A. duranensis//A. hypogaea cv. NC2), is noted for its resistance to Puccinia arachidis and Sclerotium rolfsii [Corticium rolfsii] and its tolerance of Phaeoisariopsis personata [Mycosphaerella berkeleyi], Cercospora arachidicola [Mycosphaerella arachidis], peanut bud necrosis virus and peanut mottle potyvirus. It also suffers less damage due to Empoasca kerri and Spodoptera litura than control cultivars under field conditions. In 20 replicated trials conducted in different locations in India during 1987-90, ICGV86699 produced an average pod yield of 1.25 t/ha, 47% greater than Kadiri 3. Similarly, in Myanmar its pod yield averaged 1.42 t/ha, 100% greater than the local cultivar Sinpadetha 2. ICGV86699 has a Decumbent 3 growth habit, alternate branching and medium-sized elliptic green leaves. It matures in ~118 days in the rainy season in India. Pods are mostly 2-seeded with average meat content of 60%. Seeds are red, weigh 38 g per 100 seeds and contain 48% oil and 24% protein.
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An improved field screening technique for resistance to rust and late leaf spot diseases in groundnut (1)
1991Co-Authors: F Waliyar, D. McdonaldAbstract:Field screening of germplasm lines at the ICRISAT Center, Patancheru, India, is done under high disease pressure from Puccinia arachidis and Phaeoisariopsis personata [Mycosphaerella berkeleyi]. Problems were encountered in disease scoring when both diseases are severe. A technique is described using selective fungicides to screen groundnut genotypes for each disease individually under these conditions of multiple disease pressure
Rao J N - One of the best experts on this subject based on the ideXlab platform.
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Components of resistance to late leaf spot caused by Phaeoisariopsis personata in inter-specific derivatives of groundnut
2002Co-Authors: Pande S, Rao J N, Dwivedi S LAbstract:The components of resistance to late leaf spot caused P. personata [Mycosphaerella berkeleyi] of five interspecific hybrid cultivars of groundnut, along with two susceptible cultivars, were determined during the rainy seasons of 1997-98 in greenhouse and field experiments conducted in Patancheru, Andhra Pradesh, India. All the interspecific hybrid cultivars showed significantly longer incubation and latent periods; lower lesion number and frequency; smaller lesion diameter; and less sporulation indices, leaf area damage and defoliation under both environments compared to the susceptible cultivars. Latent period, lesion diameter, sporulation index and defoliation were the major contributing components to the resistance of groundnuts to late leaf spot
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Resistance of wild Arachis species to late leaf spot and rust in greenhouse trials
'Scientific Societies', 2001Co-Authors: Pande S, Rao J NAbstract:Seventy-four accessions of wild Arachis species along with a susceptible line TMV 2 belonging to A. hypogaea were evaluated for resistance to late leaf spot and rust (caused by Phaeoisariopsis personata [Mycosphaerella berkeleyi] and Puccinia arachidis, respectively) under greenhouse environment. The experiment was conducted twice to confirm the resistance of the accessions. Percentage of leaf area damaged and disease score on a 1 to 9 scale for late leaf spot and rust were recorded for all accessions in both experiments. Additionally, percentage of defoliation was recorded for late leaf spot. One accession of A. hoehnei, ICG 8190, and one accession of A. duranensis, ICG 13199, were asymptomatic to late leaf spot in both experiments. In addition, 26 accessions were classified as resistant, 10 accessions were moderately resistant, and the remaining 36 accessions exhibited a susceptible reaction to late leaf spot. Only one accession of A. kuhlmannii, ICG 8954, remained asymptomatic to rust in both experiments. All other accessions, except ICG 8206 of A. ipaensis, ICG 8197, ICG 8198, ICG 11549, and ICG 13178 of A. monticola, and ICG 13171 of A. stenosperma were classified as highly resistant to rust. Four accessions of A. monticola were susceptible to late leaf spot and rust
Pande S - One of the best experts on this subject based on the ideXlab platform.
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Components of resistance to late leaf spot caused by Phaeoisariopsis personata in inter-specific derivatives of groundnut
2002Co-Authors: Pande S, Rao J N, Dwivedi S LAbstract:The components of resistance to late leaf spot caused P. personata [Mycosphaerella berkeleyi] of five interspecific hybrid cultivars of groundnut, along with two susceptible cultivars, were determined during the rainy seasons of 1997-98 in greenhouse and field experiments conducted in Patancheru, Andhra Pradesh, India. All the interspecific hybrid cultivars showed significantly longer incubation and latent periods; lower lesion number and frequency; smaller lesion diameter; and less sporulation indices, leaf area damage and defoliation under both environments compared to the susceptible cultivars. Latent period, lesion diameter, sporulation index and defoliation were the major contributing components to the resistance of groundnuts to late leaf spot
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Resistance of wild Arachis species to late leaf spot and rust in greenhouse trials
'Scientific Societies', 2001Co-Authors: Pande S, Rao J NAbstract:Seventy-four accessions of wild Arachis species along with a susceptible line TMV 2 belonging to A. hypogaea were evaluated for resistance to late leaf spot and rust (caused by Phaeoisariopsis personata [Mycosphaerella berkeleyi] and Puccinia arachidis, respectively) under greenhouse environment. The experiment was conducted twice to confirm the resistance of the accessions. Percentage of leaf area damaged and disease score on a 1 to 9 scale for late leaf spot and rust were recorded for all accessions in both experiments. Additionally, percentage of defoliation was recorded for late leaf spot. One accession of A. hoehnei, ICG 8190, and one accession of A. duranensis, ICG 13199, were asymptomatic to late leaf spot in both experiments. In addition, 26 accessions were classified as resistant, 10 accessions were moderately resistant, and the remaining 36 accessions exhibited a susceptible reaction to late leaf spot. Only one accession of A. kuhlmannii, ICG 8954, remained asymptomatic to rust in both experiments. All other accessions, except ICG 8206 of A. ipaensis, ICG 8197, ICG 8198, ICG 11549, and ICG 13178 of A. monticola, and ICG 13171 of A. stenosperma were classified as highly resistant to rust. Four accessions of A. monticola were susceptible to late leaf spot and rust
