Genetic dynamics of earlier maturity group emergence in south-to-north extension of Northeast China soybeans
文献类型: 外文期刊
作者: Fu, Mengmeng 1 ; Wang, Yanping 6 ; Ren, Haixiang 6 ; Du, Weiguang 6 ; Wang, Deliang 8 ; Bao, Rongjun 9 ; Yang, Xingyon 1 ;
作者机构: 1.Nanjing Agr Univ, Soybean Res Inst, Nanjing 210095, Jiangsu, Peoples R China
2.Nanjing Agr Univ, MARA Natl Ctr Soybean Improvement, Nanjing 210095, Jiangsu, Peoples R China
3.Nanjing Agr Univ, MARA Key Lab Biol & Genet Improvement Soybean, Nanjing 210095, Jiangsu, Peoples R China
4.Nanjing Agr Univ, Natl Key Lab Crop Genet & Germplasm Enhancement, Nanjing 210095, Jiangsu, Peoples R China
5.Nanjing Agr Univ, Jiangsu Collaborat Innovat Ctr Modern Crop Prod, Nanjing 210095, Jiangsu, Peoples R China
6.Heilongjiang Acad Agr Sci, Mudanjiang Res & Dev Ctr Soybean, Mudanjiang 157041, Heilongjiang, Peoples R China
7.Heilongjiang Acad Agr Sci, Mudanjiang Expt Stn Natl Ctr Soybean Improvement, Mudanjiang Branch, Mudanjiang 157041, Heilongjiang, Peoples R China
8.Heilongjiang Acad Land Reclamat Sci, Jiamusi 154007, Heilongjiang, Peoples R China
9.Heilongjiang Acad Agr Sci, Beian Branch, Beian 164009, Heilongjiang, Peoples R China
10.Heilongjiang Acad Agr Sci, Keshan Branch, Keshan 161606, Heilongjiang, Peoples R China
11.Heilongjiang Acad Agr Sci, Daqing Branch, Daqing 163316, Heilongjiang, Peoples R China
12.Tieling Acad Agr Sci, Tieling 112616, Liaoning, Peoples R China
13.Changchun Acad Agr Sci, Changchun 130111, Jilin, Peoples R China
14.Baicheng Acad Agr Sci, Baicheng 137000, Jinlin, Peoples R China
15.Hulunbeier Acad Agr Sci, Hulunbeier 162650, Inner Mongolia, Peoples R China
期刊名称:THEORETICAL AND APPLIED GENETICS ( 2020影响因子:5.699; 五年影响因子:5.565 )
ISSN: 0040-5752
收录情况: SCI
摘要: Key message This population genetic study is characterized with direct comparisons of days to flowering QTL-allele matrices between newly evolved and originally old maturity groups of soybeans to explore its evolutionary dynamics using the RTM-GWAS procedure. The Northeast China (NEC) soybeans are the major germplasm source of modern soybean production in Americas (> 80% of the world total). NEC is a relatively new soybean area in China, expanded after its nomadic status in the seventeenth century. At nine sites of four ecoregions in NEC, 361 varieties were tested for their days to flowering (DTF), a geography-sensitive trait as an indicator for maturity groups (MGs). The DTF reduced obviously along with soybeans extended to higher latitudes, ranging in 41-83 days and MG 000-III. Using the RTM-GWAS (restricted two-stage multi-locus model genome-wide association study) procedure, 81 QTLs with 342 alleles were identified, accounting for 77.85% genetic contribution (R-2 = 0.01-7.74%/locus), and other 20.75% (98.60-77.85%, h(2) = 98.60%) genetic variation was due to a collective of unmapped QTLs. With soybeans northward, breeding effort made the original MG I-III evolved to MG 0-00-000. In direct comparisons of QTL-allele matrices among MGs, the genetic dynamics are identified with local exotic introduction/migration (58.48%) as the first and selection against/exclusion of positive alleles causing new recombination (40.64%) as the second, while only a few allele emergence/mutation happened (0.88%, limited in MG 0, not in MG 00-000). In new MG emergence, 24 QTLs with 19 candidate genes are the major sources. A genetic potential of further DTF shortening (13-21 days) is predicted for NEC population. The QTL detection in individual ecoregions showed various ecoregion-specific QTLs-alleles/genes after co-localization treatment (removing the random environment shifting ones).
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