Genetic association of lint yield with its components in cotton chromosome substitution lines
Genetic association of lint yield with its components in cotton chromosome substitution lines
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DOI：
10.1007/s10681-008-9705-6
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发表时间：
2008-05
期刊：
影响因子：
1.9
通讯作者：
Jixiang Wu;J. Jenkins;J. McCarty;S. Saha;R. Percy
中科院分区：
文献类型：
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作者：
Jixiang Wu;J. Jenkins;J. McCarty;S. Saha;R. Percy
在染色体水平上剖析皮棉产量及其产量构成因素之间的遗传关系，可能为棉花(Gossypium hirsuumL.)的增产提供另一条途径。在条件加性-显性(AD)遗传模型的基础上，利用棉花染色体代换系(染色体或染色体臂代换自G)的两点数据集，研究了皮棉产量与衣分、铃重和铃数三个构成性状的遗传结构。BarbadenseL.转到G。被定义为CS-B系及其与CS-B轮回亲本TM-1的F2杂交。我们计算了条件方差分量、贡献率和受加性和显性分量影响的贡献效应。结果表明，铃数或铃重显著降低了皮棉产量的条件方差分量和表型方差，说明铃数对皮棉产量的影响大于其他两个构成性状。我们证明了这一点。CS-B16、CS-B18和CS-B4sh中的Barbadensech染色体与皮棉产量下降直接相关。替代染色体臂14sh、22sh和22Lo通过铃重构成因素对皮棉产量的加性效应减弱，这表明部分替代染色体或染色体臂可能通过产量构成性状间接影响皮棉产量。本研究在染色体水平上对棉花产量及其构成性状有了更好的了解，为棉花育种提供了有用的信息。
Dissection of the genetic relationship between lint yield and its yield components at the chromosome level may provide an additional avenue for yield enhancement in cotton (Gossypium hirsutumL.). Based on the conditional additive-dominance (AD) genetic model, we investigated the genetic structures of lint yield with its three component traits, lint percentage, boll weight, and boll number, using a two-location data set containing cotton chromosome substitution lines (chromosome or chromosome arm substituted fromG. barbadenseL. intoG. hirsutumL., TM-1) which are defined as CS-B lines and their F2hybrids with CS-B recurrent parent TM-1. We calculated the conditional variance components, contribution ratios, and contribution effects subject to the additive and dominant components. Our results showed that boll number or boll number with boll weight greatly reduced the conditional variance components and phenotypic variance for lint yield and thus indicated that boll number plays a more important role in lint yield than the other two component traits. We demonstrated that theG. barbadensechromosomes in CS-B16, CS-B18, and CS-B4sh were directly associated with reduced lint yield. Substituted chromosome arms 14sh, 22sh, and 22Lo were associated with reduced additive effects for lint yield through the component of boll weight, thus suggesting that some substituted chromosomes or chromosome arms may be indirectly associated with lint yield through yield component traits. This study provides a better understanding of cotton yield and its component traits at the chromosome level and this information should be useful in cotton breeding.