Genetic analysis of the fiber quality and yield traits in G-hirsutum background using chromosome segments substitution lines (CSSLs) from Gossypium barbadense

文献类型： 外文期刊

第一作者： Lixue Guo

作者： Lixue Guo;Yuzhen Shi;Juwu Gong;Aiying Liu;Yunna Tan;Wankui Gong;Junwen Li;Tingting Chen;Haihong Shang;Qun Ge;Quanwei Lu;Jie Sun;Youlu Yuan

作者机构：

关键词： Cotton; CSSL; Fiber quality and yield; QTL

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： 2018 年 214 卷 5 期

页码：

收录情况： SCI

摘要： Developing chromosome segments substitution lines (CSSLs) is an effective method for broadening the cotton germplasm resource, and improving the fiber quality and yield traits. In this study, the 1054 F-2 individual plants and 116 F-2:3 lineages were generated from the two parents of MBI9749 and MBI9915 selected from BC5F3:5 lines which originated from hybridization of CCRI36 and Hail, and advanced backcrossing and repeated selfing. Genotypes of the parents and F-2 population were analyzed. The results showed that 19 segments were introgressed for MBI9749 and 12 segments were introgressed for MBI9915, distributing on 17 linkage groups. The average background recovery rate to the recurrent parent CCRI36 was 96.70% for the two parents. An average of 16.46 segments was introgressed in F2 population. The average recovery rate of 1054 individual plants was 96.85%, and the mean length of sea island introgression segments was 157.18 cM, accounting for 3.15% of detection length. QTL mapping analysis detected 22 QTLs associated with fiber quality and yield traits in the F-2 and F-2: 3 populations. These QTLs distributed on seven chromosomes, and the phenotypic variation was explained ranging from 1.20 to 14.61%. Four stable QTLs were detected in F2 and F2: 3 populations, simultaneously. We found that eight QTLs were in agreement with the previous research. Six QTL-clusters were identified for fiber quality and yield traits, in which five QTL-clusters were on chromosome20. The results indicated that most of QTL-clusters always improve the fiber quality and have negative additive effect for yield related traits. This study demonstrated that CSSLs provide basis for fine mapping of the fiber quality and yield traits in future, and could be efficiently used for pyramiding favourable alleles to develop the new germplasms for breeding by molecular marker-assisted selection.

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