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Identification of QTL-allele systems of seed size and oil content for simultaneous genomic improvement in Northeast China soybeans

文献类型： 外文期刊

作者： He, Jianbo 1 ; Fu, Lianshun 8 ; Hao, Xiaoshuai 1 ; Wu, Yicun 1 ; Wang, Mengfan 1 ; Zhang, Qi 1 ; Feng, Weidan 1 ; Fu, Mengmeng 1 ; Wang, Yanping 9 ; Ren, Haixiang 9 ; Du, Weiguang 9 ; Wang, Wubin 1 ; Gai, Junyi 1 ;

作者机构： 1.Nanjing Agr Univ, Soybean Res Inst, Nanjing, Peoples R China

2.Nanjing Agr Univ, MARA Natl Ctr Soybean Improvement, Nanjing, Peoples R China

3.Nanjing Agr Univ, MARA Key Lab Biol & Genet Improvement Soybean, Nanjing, Peoples R China

4.Nanjing Agr Univ, State Key Lab Crop Genet & Germplasm Enhancement &, Nanjing, Peoples R China

5.Nanjing Agr Univ, State Innovat Platform Integrated Prod & Educ Soyb, Nanjing, Peoples R China

6.Nanjing Agr Univ, Zhongshan Biol Breeding Lab, Nanjing, Peoples R China

7.Nanjing Agr Univ, Jiangsu Collaborat Innovat Ctr Modern Crop Prod, Nanjing, Peoples R China

8.Tieling Acad Agr Sci, Soybean Res Inst, Tieling, Peoples R China

9.Heilongjiang Acad Agr Sci, Mudanjiang Res & Dev Ctr Soybean, Mudanjiang Branch, Mudanjiang, Peoples R China

10.Heilongjiang Acad Agr Sci, Mudanjiang Expt Stn Natl Ctr Soybean Improvement, Mudanjiang Branch, Mudanjiang, Peoples R China

关键词： Northeast China soybean germplasm population (NECSGP); 100-seed weight (100SW); seed oil content (SOC); RTM-GWAS; recombination potential prediction; simultaneous genomic cross design for traits; evolutionary dynamics

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：4.8； 五年影响因子：5.7 ）

ISSN： 1664-462X

年卷期： 2024 年 15 卷

页码：

收录情况： SCI

摘要： Northeast China (NEC) is the major production area for soybeans in China, whereas its soybean germplasm has played key roles in world soybean production, especially in the Americas. For plant breeding, genomic selection involves two stages, cross design and progeny selection, with the former determining the latter's potential. In NEC, one of the major breeding purposes is for 100-seed weight (100SW) and seed oil content (SOC). A diverse sample with 361 NEC soybean germplasm accessions was evaluated for their 100SW and SOC in Tieling, Liaoning, China. Both traits exhibited significant phenotypic, genotypic, and G x E variation, with a trait heritability of 82.38% and 86.26%, respectively. A restricted two-stage multi-locus genome-wide association study (RTM-GWAS) with 15,501 SNPLDB (SNP linkage disequilibrium block) markers identified 80 and 92 QTLs with 230 and 299 alleles for 100SW and SOC, respectively. Corresponding to some increase of the two traits, almost all the alleles in the early maturity groups (MG 0 + 00 + 000) were inherited from the late MGs (MG I+II+III), indicating that genetic recombination was the major motivator in addition to a few allele emergence and some allele exclusion fluctuations among early MGs. Using the 95th percentile as indicator, the prediction of recombination potentials showed that 30.43 g 100SW and 27.73% SOC might be achieved, respectively. Three strategies of simultaneous genomic improvement of both traits in designing optimal crosses, namely, 100SW-first, SOC-first, and 100SW-SOC-balance, were proved to be efficient. Thus, the optimal cross design could be extended to multiple traits based on a relatively thorough identification of the QTL-alleles using RTM-GWAS.

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