The Experts below are selected from a list of 300 Experts worldwide ranked by ideXlab platform
Xiangdong Liu - One of the best experts on this subject based on the ideXlab platform.
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Crossability barriers in the Interspecific Hybridization between Oryza sativa and O. meyeriana.
Journal of integrative plant biology, 2009Co-Authors: Xiangdong LiuAbstract:Oryza meyeriana Baill (GG genome) is a precious germplasm in the tertiary gene pool of cultivated rice (AA genome), and possesses important traits such as resistance and tolerance to biotic and abiotic stress. However, Interspecific crossability barrier, a critical bottleneck restricting genes transfer from O. meyeriana to cultivars has led to no hybrids through conventional reproduction. Therefore, the reasons underlying incrossability were investigated in the present report. The results showed that: (i) at 3-7 d after pollination (DAP), many hybrid embryos degenerated at the earlier globular-shaped stage, and could not develop into the later pear-shaped stage. Meanwhile, free endosperm nuclei started to degenerate at 1 DAP, and cellular endosperm could not form at 3 DAP, leading to nutrition starvation for young embryo development; (ii) at 11-13 DAP, almost all hybrid ovaries aborted. Even though 72.22% of hybrid young embryos were produced in the Interspecific Hybridization between O. sativa and O. meyeriana, young embryos were not able to further develop into hybrid plantlets via culturing in vitro. The main reason for the incrossability was hybrid embryo inviability, presenting as embryo development stagnation and degeneration since 3 DAP. Some possible approaches to overcome the crossability barriers in the Interspecific Hybridization between O. sativa and O. meyeriana are discussed.
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Progress on Transferring Elite Genes from Non-AA Genome Wild Rice into Oryza sativa through Interspecific Hybridization
Rice Science, 2008Co-Authors: Xiangdong LiuAbstract:The progress of research on transferring elite genes from non-AA genome wild rice into Oryza sativa through Interspecific Hybridization are in three respects, that is, breeding monosomic alien addition lines (MAALs), constructing introgression lines (ILs) and analyzing the heredity of the characters and mapping the related genes. There are serious reproductive barriers, mainly incrossability and hybrid sterility, in the Interspecific Hybridization of O. sativa with non-AA genome wild rice. These are the ‘bottleneck’ for transferring elite genes from wild rice to O. sativa. Combining traditional crossing method with biotechnique is a reliable way to overcome the reproductive barriers and to improve the utilizing efficiency of non-AA genome wild rice.
Daniel Renison - One of the best experts on this subject based on the ideXlab platform.
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Intra- and Interspecific Hybridization in invasive Siberian elm
Biological Invasions, 2017Co-Authors: Heidi Hirsch, Johanne Brunet, Juan E. Zalapa, Henrik Wehrden, Matthias Hartmann, Carolin Kleindienst, Brandon Schlautman, Evsey Kosman, Karsten Wesche, Daniel RenisonAbstract:Hybridization creates unique allele combinations which can facilitate the evolution of invasiveness. Frequent Interspecific Hybridization between the Siberian elm, Ulmus pumila , and native elm species has been detected in the Midwestern United States, Italy and Spain. However, Ulmus pumila also occurs in the western United States and Argentina, regions where no native elm species capable of hybridizing with it occurs. We examined whether inter- or intraspecific Hybridization could be detected in these regions. Nuclear markers and the program STRUCTURE helped detect Interspecific Hybridization and determine the population genetic structure in both the native and the two non-native ranges. Chloroplast markers identified sources of introduction into these two non-native ranges. No significant Interspecific Hybridization was detected between U. pumila and U. rubra in the western United States or between U. pumila and U. minor in Argentina and vice versa. However, the genetic findings supported the presence of intraspecific Hybridization and high levels of genetic diversity in both non-native ranges. The evidence presented for intraspecific Hybridization in the current study, combined with reports of Interspecific Hybridization from previous studies, identifies elm as a genus where both inter- and intraspecific Hybridization may occur and help maintain high levels of genetic diversity potentially associated with invasiveness.
R Abbott - One of the best experts on this subject based on the ideXlab platform.
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plant invasions Interspecific Hybridization and the evolution of new plant taxa
Trends in Ecology and Evolution, 1992Co-Authors: R AbbottAbstract:Abstract Interspecific Hybridization between a native and an invading plant species, or two invading species, sometimes results in a new, sexually reproducing taxon. Several examples of such taxa have been confirmed by recent molecular and isozyme analyses. Further study of these new taxa, when recognized soon after their origin, should aim to elucidate the factors that influence their subsequent establishment and spread, thus leading to a better understanding of the processes that lead to successful speciation. Plant hybrids formed following a plant invasion provide great potential for the study of ‘evolution in action'.
Heidi Hirsch - One of the best experts on this subject based on the ideXlab platform.
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Intra- and Interspecific Hybridization in invasive Siberian elm
Biological Invasions, 2017Co-Authors: Heidi Hirsch, Johanne Brunet, Juan E. Zalapa, Henrik Wehrden, Matthias Hartmann, Carolin Kleindienst, Brandon Schlautman, Evsey Kosman, Karsten Wesche, Daniel RenisonAbstract:Hybridization creates unique allele combinations which can facilitate the evolution of invasiveness. Frequent Interspecific Hybridization between the Siberian elm, Ulmus pumila , and native elm species has been detected in the Midwestern United States, Italy and Spain. However, Ulmus pumila also occurs in the western United States and Argentina, regions where no native elm species capable of hybridizing with it occurs. We examined whether inter- or intraspecific Hybridization could be detected in these regions. Nuclear markers and the program STRUCTURE helped detect Interspecific Hybridization and determine the population genetic structure in both the native and the two non-native ranges. Chloroplast markers identified sources of introduction into these two non-native ranges. No significant Interspecific Hybridization was detected between U. pumila and U. rubra in the western United States or between U. pumila and U. minor in Argentina and vice versa. However, the genetic findings supported the presence of intraspecific Hybridization and high levels of genetic diversity in both non-native ranges. The evidence presented for intraspecific Hybridization in the current study, combined with reports of Interspecific Hybridization from previous studies, identifies elm as a genus where both inter- and intraspecific Hybridization may occur and help maintain high levels of genetic diversity potentially associated with invasiveness.
Di Shen - One of the best experts on this subject based on the ideXlab platform.
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Interspecific Hybridization polyploidization and backcross of brassica oleracea var alboglabra with b rapa var purpurea morphologically recapitulate the evolution of brassica vegetables
Scientific Reports, 2016Co-Authors: Xiaohui Zhang, Tongjin Liu, Mengmeng Duan, Jinglei Wang, Yang Qiu, Haiping Wang, Jiangping Song, Di ShenAbstract:Brassica oleracea and B. rapa are two important vegetable crops. Both are composed of dozens of subspecies encompassing hundreds of varieties and cultivars. Synthetic B. napus with these two plants has been used extensively as a research model for the investigation of allopolyploid evolution. However, the mechanism underlying the explosive evolution of hundreds of varieties of B. oleracea and B. rapa within a short period is poorly understood. In the present study, Interspecific Hybridization between B. oleracea var. alboglabra and B. rapa var. purpurea was performed. The backcross progeny displayed extensive morphological variation, including some individuals that phenocopied subspecies other than their progenitors. Numerous interesting novel phenotypes and mutants were identified among the backcross progeny. The chromosomal recombination between the A and C genomes and the chromosomal asymmetric segregation were revealed using Simple Sequence Repeats (SSR) markers. These findings provide direct evidence in support of the hypothesis that Interspecific Hybridization and backcrossing have played roles in the evolution of the vast variety of vegetables among these species and suggest that combination of Interspecific Hybridization and backcrossing may facilitate the development of new mutants and novel phenotypes for both basic research and the breeding of new vegetable crops.
