Comparative mapping of quantitative trait loci for tassel-related traits of maize in F2:3 and RIL populations

Journal of genetics

QIANG YI^1¹  XIANGGE ZHANG^1²  YINGHONG LIU^2³ 

[1] Agronomy College, Sichuan Agricultural University, Chengdu 611130, Sichuan, People’s Republic of China^1;Life Science College, Sichuan Agricultural University, Yaan 625014, Sichuan, People’s Republic of China^3;Maize Research Institute, Sichuan Agricultural University, Chengdu 611130, Sichuan, People’s Republic of China^2

关键词: maize;    tassel;    comparative quantitative trait loci mapping;    generation;   

DOI  :  

学科分类：生物科学（综合）

来源: Indian Academy of Sciences

【 摘 要 】

Tassel architecture is an important trait in maize breeding and hybrid seed production. In this study, we investigated total tassel length (TTL) and tassel branch number (TBN) in 266 F2:3 families across six environments and in 301 recombinant inbred lines (RILs) across three environments, where all the plants were derived from a cross between 08-641 and Ye478. We compared thegenetic architecture of the two traits across two generations through combined analysis. In total, 27 quantitative trait loci (QTLs) (15 in F2:3; 16 in RIL), two QTL × environment interactions (both in F2:3), 11 pairs of epistatic interactions (seven in F2:3; four in RIL) and four stable QTLs in both the F2:3 and RILs were detected. The RIL population had higher detection power than the F2:3 population. Nevertheless, QTL × environment interactions and epistatic interactions could be more easily detected in the F2:3 population than in the RILs. Overall, the QTL mapping results in the F2:3 and RILs were greatly influenced by genetic generations and environments. Finally, fine mapping for a novel and major QTL, qTTL-2-3 (bin 2.07), which accounted for over 8.49% of the phenotypic variation across different environments and generations, could be useful in marker-assisted breeding.

【 授权许可】

CC BY