Genome-Wide Association Study and Prediction of Tassel Weight of Tropical Maize Germplasm in Multi-Parent Population

被引:2
|
作者
Liu, Meichen [1 ]
Zhang, Yudong [2 ]
Shaw, Ranjan K. [2 ]
Zhang, Xingjie [1 ]
Li, Jinfeng [1 ]
Li, Linzhuo [1 ]
Li, Shaoxiong [1 ]
Adnan, Muhammad [2 ]
Jiang, Fuyan [2 ]
Bi, Yaqi [2 ]
Yin, Xingfu [2 ]
Fan, Xingming [2 ]
机构
[1] Yunnan Univ, Sch Agr, Kunming 650500, Peoples R China
[2] Yunnan Acad Agr Sci, Inst Food Crops, Kunming 650205, Peoples R China
基金
中国国家自然科学基金;
关键词
tassel weight; genome-wide association study; candidate gene; genomic selection; GENETIC ARCHITECTURE; QUALITY-CONTROL; QTL ANALYSIS; ROOT-GROWTH; PROTEIN; ARABIDOPSIS; TRAITS; EXPRESSION; DIVERSITY; NUMBER;
D O I
10.3390/ijms25031756
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Tassel weight (TW) is a crucial agronomic trait that significantly affects pollen supply and grain yield development in maize breeding. To improve maize yield and develop new varieties, a comprehensive understanding of the genetic mechanisms underlying tassel weight is essential. In this study, tropical maize inbred lines, namely CML312, CML373, CML444, and YML46, were selected as female parents and crossed with the elite maize inbred line Ye107, which served as the common male parent, to develop a multi-parent population comprising four F8 recombinant inbred line (RIL) subpopulations. Using 6616 high-quality single nucleotide polymorphism (SNP) markers, we conducted genome-wide association analysis (GWAS) and genomic selection (GS) on 642 F8 RILs in four subpopulations across three different environments. Through GWAS, we identified 16 SNPs that were significantly associated with TW, encompassing two stable loci expressed across multiple environments. Furthermore, within the candidate regions of these SNPs, we discovered four novel candidate genes related to TW, namely Zm00001d044362, Zm00001d011048, Zm00001d011049, and Zm00001d031173 distributed on chromosomes 1, 3, and 8, which have not been previously reported. These genes are involved in processes such as signal transduction, growth and development, protein splicing, and pollen development, all of which play crucial roles in inflorescence meristem development, directly affecting TW. The co-localized SNP, S8_137379725, on chromosome 8 was situated within a 16.569 kb long terminal repeat retrotransposon (LTR-RT), located 22.819 kb upstream and 26.428 kb downstream of the candidate genes (Zm00001d011048 and Zm00001d011049). When comparing three distinct GS models, the BayesB model demonstrated the highest accuracy in predicting TW. This study establishes the theoretical foundation for future research into the genetic mechanisms underlying maize TW and the efficient breeding of high-yielding varieties with desired tassel weight through GS.
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页数:18
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