The Extent of Natural Cross-Pollination in Wild Soybean (Glycine soja)

Fujita, Ryohei; Ohara, Masashi; Okazaki, Kazuyuki; Shimamoto, Yuta

doi:10.1093/oxfordjournals.jhered.a023070

Cited by 83 publications

(71 citation statements)

References 18 publications

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“…Ahrent and Caviness (1994) observed rates as high as 2.55% under field conditions in which beehives were present. Fujita et al (1997) reported that the out-crossing rate for the wild soybean G. soja was 13%, which is much higher than that previously reported for G. max. This higher out-crossing rate appears to be related to frequent visits by honeybees and carpenter bees.…”

Section: Discussioncontrasting

confidence: 57%

Gene flow from GM glyphosate-tolerant to conventional soybeans under field conditions in Japan

Yoshimura

Matsuo

Yasuda

2006

Environ. Biosafety Res.

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Section: Discussioncontrasting

confidence: 57%

Gene flow from GM glyphosate-tolerant to conventional soybeans under field conditions in Japan

Yoshimura

Matsuo

Yasuda

2006

Environ. Biosafety Res.

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“…If introgression of a transgene from GM soybeans to wild soybeans occurs, such backcrossed hybrids should appear. However, natural backcrossing rates seem to be low, because outcrossing rates of wild soybean populations are much lower than selfing rates (Fujita et al 1997;Kiang et al 1992;Kuroda et al 2008). Kuroda et al (2010) reported that introgression of cultivated soybean genes into wild soybeans appears to be rare based on the fate of intermediates between wild and cultivated soybeans in their natural habitats in Japan.…”

Section: Discussionmentioning

confidence: 99%

Characterization of hybrids between wild and genetically modified glyphosate-tolerant soybeans

Kubo

Aono

Nakajima

et al. 2013

Plant Biotechnology

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With the first approval of a genetically modified (GM) soybean for uncontained use in Japan, information about hybrids of wild and GM or non-GM soybeans has become increasingly important. Therefore, we generated and characterized various hybrids between wild and GM or non-GM soybeans in a containment greenhouse, and investigated the inheritance of the cp4 epsps transgene and its effects on the hybrids. The hybrids inherited the cp4 epsps gene in a Mendelian fashion. The gene was stably expressed and produced functional protein, conferring glyphosate tolerance to the hybrids. We also examined the germination and survival rates of the second filial (F 2 ) seeds and those of hybrids backcrossed twice (BC2F 2 ) after a 3-month treatment at 4°C. Hybrids displayed similar germination characteristics as wild soybean after cold treatment. The majority of the BC2F 2 seeds survived as dormant seeds. There was no effect of the cp4 epsps gene on the survival rate. Furthermore, we examined the morphology, anthesis, and fecundity of the hybrids. On the whole, the F 1 , F 2 , and F 3 hybrids exhibited morphology, anthesis, and fecundity phenotypes that were intermediate between wild and cultivated soybeans; those of BC2F 2 hybrids were similar to those of wild soybean. Comparisons between GM and the corresponding non-GM hybrids did not reveal significant differences in fecundity. We suggest that hybrids containing half of their genes from wild soybean and half from cultivated soybean display fitness that are intermediate between wild and cultivated soybeans, whereas BC2F 2 hybrids have fitness similar to that of wild soybean. We also suggest that, despite being stably inherited, the cp4 epsps gene does not affect fitness in the absence of glyphosate treatment.

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“…For example, the cultivated soybean (Glycine max) and its ancestor, Glycine soja, differ significantly in their outcrossing rates. The self-pollinating G. max has an outcrossing rate of approximately 1%, whereas G. soja outcrosses at an average rate of 13% (16). For low-resolution mapping, cultivated varieties may be best, whereas fine mapping would be more effective in populations of wild relatives.…”

Section: Selfing Versus Outcrossing Speciesmentioning

confidence: 99%

Structure of Linkage Disequilibrium in Plants

Flint-García

Thornsberry

Buckler

2003

Annu. Rev. Plant Biol.

1,429

1,137

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Key Words gametic phase disequilibrium, allelic association, association mapping, recombination, quantitative trait loci (QTL) s Abstract Future advances in plant genomics will make it possible to scan a genome for polymorphisms associated with qualitative and quantitative traits. Before this potential can be realized, we must understand the nature of linkage disequilibrium (LD) within a genome. LD, the nonrandom association of alleles at different loci, plays an integral role in association mapping, and determines the resolution of an association study. Recently, association mapping has been exploited to dissect quantitative trait loci (QTL). With the exception of maize and Arabidopsis, little research has been conducted on LD in plants. The mating system of the species (selfing versus outcrossing), and phenomena such as population structure and recombination hot spots, can strongly influence patterns of LD. The basic patterns of LD in plants will be better understood as more species are analyzed.

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The Extent of Natural Cross-Pollination in Wild Soybean (Glycine soja)

Cited by 83 publications

References 18 publications

Gene flow from GM glyphosate-tolerant to conventional soybeans under field conditions in Japan

Gene flow from GM glyphosate-tolerant to conventional soybeans under field conditions in Japan

Characterization of hybrids between wild and genetically modified glyphosate-tolerant soybeans

Structure of Linkage Disequilibrium in Plants

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