Genetic analysis of plant height using two immortalized populations of "CRI12 x J8891" in Gossypium hirsutum L.

文献类型： 外文期刊

第一作者： Liu, Renzhong

作者： Liu, Renzhong;Liu, Renzhong;Ai, Nijiang;Zhu, Xinxia;Liu, Fengju;Guo, Wangzhen;Zhang, Tianzhen

作者机构：

关键词： Gossypium hirsutum L.; Plant height; Recombinant inbred lines; Immortalized F-2; QTL tagging

期刊名称：EUPHYTICA （ 影响因子：1.895； 五年影响因子：2.181 ）

ISSN： 0014-2336

年卷期： 2014 年 196 卷 1 期

页码：

收录情况： SCI

摘要： Plant height is an important plant architecture trait that determines the canopy structure, photosynthetic capacity and lodging resistance of upland cotton populations. To understand the genetic basis of plant height for marker-assisted breeding, quantitative trait loci (QTL) analysis was conducted based on the genetic map of recombinant inbred lines (RILs) derived from the cross "CRI12 x J8891" (Gossypium hirsutum L.). Three methods, including composite interval mapping, multiple interval mapping and multi-marker joint analysis, were used to detect QTL across multiple environments in the RILs and in the immortalized F-2 population developed through intermating between RILs. A total of 19 QTL with genetic main effects and/or genetic x environment interaction effects were identified on 15 chromosomes or linkage groups, each explaining 5.8-14.3 % of the phenotypic variation. Five digenic epistatic QTL pairs, mainly involving additive x additive and/or dominance x dominance, were detected in different environments. Seven out of eight interacting loci were main-effect QTL, suggesting that these loci act as major genes as well as modifying genes in the expression of plant height. The results demonstrate that additive effects, dominance and epistasis are all important for the genetic constitution of plant height, with additive effects playing a more important role in reducing plant height. QTL showing stability across environments that were repeatedly detected by different methods can be used in marker-assisted breeding.

分类号： S3

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