Simple Sequence Repeat Diversity among Soybean Plant Introductions and Elite Genotypes

Narvel, James M.; Fehr, W. R.; Chu, Wen-Chy; Grant, David; Shoemaker, Randy C.

doi:10.2135/cropsci2000.4051452x

Cited by 86 publications

(88 citation statements)

References 35 publications

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“…The abundant allelic variation per locus in this study (19.7) exceeded the previous reported 5.0-15.8 alleles per locus (Maughan et al 1995;Diwan and Cregan 1997;Narvel et al 2000;Abe et al 2003). This may be caused by our much extended sampling.…”

Section: Discussioncontrasting

confidence: 82%

“…STRUCTURE has been successfully applied on the genetic structure analyses of, for example, human (Rosenberg et al 2002), dog (Parker et al 2004), and maize (Remington et al 2001;Liu et al 2003). The program can handle large numbers of simple sequence repeat (SSR) or microsatellite markers, which are widely used because they are highly polymorphic, abundantly available and randomly distributed in the genome, and codominantly inherited (McGregor et al 2000;Narvel et al 2000).…”

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confidence: 99%

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Genetic structure and diversity of cultivated soybean (Glycine max (L.) Merr.) landraces in China

et al. 2008

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The Chinese genebank contains 23,587 soybean landraces collected from 29 provinces. In this study, a representative collection of 1,863 landraces were assessed for genetic diversity and genetic diVerentiation in order to provide useful information for eVective management and utilization. A total of 1,160 SSR alleles at 59 SSR loci were detected including 97 unique and 485 low-frequency alleles, which indicated great richness and uniqueness of genetic variation in this core collection. Seven clusters were inferred by STRUCTURE analysis, which is in good agreement with a neighbor-joining tree. The cluster subdivision was also supported by highly signiWcant pairwise F st values and was generally in accordance with diVerences in planting area and sowing season. The cluster HSuM, which contains accessions collected from the region between 32.0 and 40.5°N, 105.4 and 122.2°E along the central and downstream parts of the Yellow River, was the most genetically diverse of the seven clusters. This provides the Wrst molecular evidence for the hypotheses that the origin of cultivated soybean is the Yellow River region. A high proportion (95.1%) of pairs of alleles from diVerent loci was in LD in the complete dataset. This was mostly due to overall population structure, since the number of locus pairs in LD was reduced sharply within each of the clusters compared to the complete dataset. This shows that population structure needs to be accounted for in association studies conducted within this collection. The low value of LD within the clusters can be seen as evidence that much of the recombination events in the past have been maintained in soybean, Wxed in homozygous self-fertilizing landraces.

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Section: Discussioncontrasting

confidence: 82%

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confidence: 99%

Genetic structure and diversity of cultivated soybean (Glycine max (L.) Merr.) landraces in China

et al. 2008

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“…High levels of polymorphism were revealed in soybean by the use of neutral SSR markers, for both the number of alleles per locus and gene diversity (Akkaya et al, 1992;Narvel et al, 2000;Priolli et al, 2002;Priolli et al, 2010). In this study, using SSR markers and considering the parameters of BNF and protein content, we have also observed high variability amongst both modern germoplasms cultivated in Brazil and ancestral lines.…”

Section: Discussionsupporting

confidence: 56%

Genetic structure and diversity of a soybean germplasm considering biological nitrogen fixation and protein content

Grunvald¹,

Martins²,

Santos³

et al. 2015

Sci. agric. (Piracicaba, Braz.)

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Biological nitrogen fixation (BNF) has global economic and environmental importance, but has often not been considered in soybean [Glycine max (L.) Merrill] breeding programs. Knowing the genetic diversity and structure of a population within a germoplasm represent a key step for breeding programs. This study aimed at determining the structure of the population and diversity of soybean with regard to BNF and protein content in grain. In total, There is variability for BNF and protein content amongst both modern germoplasms cultivated in Brazil and ancestral lines. This variability could be better explored in soybean breeding programs to improve these traits.

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“…Número de alelos e índices de diversidade genética (DG) por loco em programas de melhoramento (1) . (1 168 171 174 186 192 178 181 202 205 211 257 263 350 353 138 144 147 159 147 156 159 165 150 156 162 168 214 223 235 238 247 166 175 181 relatada em estudo de diversidade genética de soja visando a introgressão de genes de PIs (Plant Introductions) em cultivares-elite de programas americanos de melhoramento (Narvel et al, 2000), inclusive com os locos Satt002, Satt005, Satt009, Satt173, Satt307 também aqui utilizados. Segundo estes autores, do total de 397 alelos de 74 locos SSRs utilizados, 138 foram exclusivos dos PIs e 32 das cultivares-elite.…”

Section: Resultsunclassified

Diversidade genética da soja entre períodos e entre programas de melhoramento no Brasil

Priolli

Mendes-Junior

Sousa

et al. 2004

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi detectar os efeitos do melhoramento sobre a diversidade do germoplasma da soja cultivada nas três ultimas décadas, por meio da comparação de seis programas de melhoramento e períodos de lançamento de cultivares, utilizando locos microssatélites. Em relação aos programas de melhoramento, todos os locos apresentaram diferenças significativas em suas distribuições alélicas. Alguns locos eram compostos de alelos exclusivos em alguns programas de melhoramento, enquanto outros foram compostos sempre dos mesmos alelos em maior freqüência para todos os programas. A AMOVA indicou maior porção da variância devido a cultivares dentro de programas e somente 5,3% (p<0,05) devido à diferença entre programas. Quando comparados os programas de melhoramento entre si, cinco entre as 15 comparações apresentaram diferenças significativas (p<0,05), estando presente o programa IAC em quatro destas cinco comparações. As estimativas de variabilidade da soja entre os períodos de melhoramento avaliados indicaram que somente 1,78% da variância total foi devida à diferença entre períodos (p>0,05). Os resultados sugerem que o germoplasma de soja utilizado em programas de melhoramento no Brasil manteve nível constante de diversidade genética nos últimos 30 anos, além de relativa heterogeneidade de determinados programas.Termos para indexação: Glycine max, SSR, germoplasma, erosão genética. Soybean genetic diversity in time and among breeding programs in BrazilAbstract -The objective of this work was to detect the effects of plant breeding over the genetic diversity of soybean germplasm grown during the last three decades by comparing six different breeding programs and releasing intervals of soybean cultivars, using microsatellite loci. Regarding the breeding programs, all loci presented significantly different allelic distributions. Some loci presented alleles restricted to unique breeding programs, while others had a same allele being the most frequent in all the six programs. The AMOVA revealed that the major proportion of the variance occurred among cultivars within breeding programs and only 5.3% (p<0.05) of the whole variance was due to differences among breeding programs. When the breeding programs were pairwise-compared, five out of the 15 comparisons showed significant differences (p<0.05), being the IAC program within four of them. Soybean variability estimates of the five different releasing intervals revealed that just 1.78% of the variance is due to differences among them (p>0.05). The results suggest that the soybean germplasm pool involved in breeding programs in Brazil has maintained a stable genetic diversity during the past 30 years, in addition to a relative heterogeneity of some breeding programs.

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Simple Sequence Repeat Diversity among Soybean Plant Introductions and Elite Genotypes

Cited by 86 publications

References 35 publications

Genetic structure and diversity of cultivated soybean (Glycine max (L.) Merr.) landraces in China

Genetic structure and diversity of cultivated soybean (Glycine max (L.) Merr.) landraces in China

Genetic structure and diversity of a soybean germplasm considering biological nitrogen fixation and protein content

Diversidade genética da soja entre períodos e entre programas de melhoramento no Brasil

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