Genetic association of cotton yield with its component traits in derived primitive accessions crossed by elite upland cultivars using the conditional ADAA genetic model
Genetic association of cotton yield with its component traits in derived primitive accessions crossed by elite upland cultivars using the conditional ADAA genetic model
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DOI：
10.1007/s10681-007-9562-8
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发表时间：
2008-06
期刊：
影响因子：
1.9
通讯作者：
J. McCarty;Jixiang Wu;J. Jenkins
中科院分区：
文献类型：
--
作者：
J. McCarty;Jixiang Wu;J. Jenkins
铃数、衣分和铃重是高地棉皮棉产量的三个组成性状。分析皮棉产量与这些构成性状的遗传关系是选育高产品系或杂交种的关键。本研究选用14个纤维品质优良的日龄中性系与5个商品品种进行高交。1998年，在密西西比州的一个地点和1999年的两个地点种植F2群体和亲本。2000年，在两个地点种植F3群体和亲本。应用ADAA遗传模型和基于混合模型的条件方法对皮棉产量及3个构成性状进行了测定和分析。结果表明，铃数或铃数与衣分或铃重对皮棉产量的表型方差和方差分量贡献最大。在各种遗传效应中，铃数比其他两个组成性状更重要。铃重对皮棉产量的贡献不显著，但铃数和铃重的组合对皮棉产量的贡献显著增加。预测了亲本和杂交组合单组分性状及其组合的遗传贡献效应。结果表明，要获得高产杂交种或纯系，应考虑铃重和铃数的平衡选择。
Boll number, lint percentage, and boll weight are three component traits for lint yield of upland cotton,Gossypium hirsutumL. Selecting high yielding lines or hybrids depends on the ability to dissect the genetic relationship of lint yield with these component traits. In this study, 14 day-neutral lines with desirable fiber quality derived from primitive accessions were top crossed with five commercial cultivars. The F2populations and parents were grown in one location in 1998 and two locations in 1999 at Mississippi State, MS. The F3populations and parents were grown in two locations in 2000. Lint yield and three component traits were measured and analyzed by the ADAA genetic model with the mixed model based conditional approach. Results showed that boll number or boll number with lint percentage or boll weight contributed to the majority of the phenotypic variance and variance components for lint yield. Boll number was more important than the other two component traits in terms of various genetic effects. The results also showed that the combination of boll number and boll weight greatly increased the contribution to lint yield even though boll weight itself had no significant contribution to lint yield compared to boll number alone. The genetic contribution effects were also predicted due to single component traits or their combinations for parents and crosses. The results revealed that the balanced selection of boll weight and boll number should be considered to obtain high yielding hybrids or pure lines.