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首页> 外文期刊>International Journal of Plant Breeding and Genetics >Combining Ability and Heterosis for Yield and Fibre Quality Traits in LinexTester Crosses of Upland Cotton (Gossypium hirsutum L.)
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Combining Ability and Heterosis for Yield and Fibre Quality Traits in LinexTester Crosses of Upland Cotton (Gossypium hirsutum L.)

机译：陆地棉LinexTester杂交的产量和纤维品质性状的综合能力和杂种优势

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摘要

The prime objective of cotton breeders is to develop new varieties with high yield and quality parameters. Present study aims to estimate general combining ability of the parents and specific combining ability and heterosis of hybrids for yield and fibre quality traits. Eight robust genotypes (Gossypium hirsutum L.) were crossed with four genotypes having compact plant type in line x tester fashion and the resulting thirty two hybrids were raised during summer 2003 in a randomized block design with two replications. Analysis of variance components indicated that 2.5% span length was predominantly controlled by additive gene action whereas the traits petiole length, length of sympodia, number of flowers per plant, days to fifty percent flowering, seeds per locule, ginning outturn, lint index, uniformity ratio and elongation percentage were governed predominantly by non-additive component. MCU 9 for seed cotton yield and 2.5% span length and KC 2 for bundle strength were the best combiners. TCH 1608X TCH 1002 exhibiting highest heterotic effect for seed cotton yield with highest per se performance and also highest SCA effect is the best combination in the present study, for direct exploitation. It also exhibited significant SCA effects for the important characters boll number and boll weight which is an encouraging feature in cotton breeding.
机译：棉花育种者的主要目标是开发具有高产量和高质量参数的新品种。本研究旨在估计亲本的一般结合能力，以及杂交种对产量和纤维品质性状的特异性结合能力和杂种优势。八个稳健的基因型（陆地棉）与四个具有紧凑型植物型的基因型以X代试验机方式进行杂交，结果在2003年夏季以随机分组设计的形式繁殖了32个杂种，重复两次。方差成分分析表明，2.5％的跨度主要受加性基因作用的控制，而性状的叶柄长度，茎突的长度，每株花的数量，开花至百分之五十的天数，每室的种子，轧花产量，皮棉指数，均匀度比例和伸长率主要由非添加剂组分决定。籽棉产量和跨距长度的2.5％的MCU 9和束强度的KC 2是最好的组合器。 TCH 1608X TCH 1002对种子棉产量表现出最高的杂种效应，其本身具有最高的性能，并且最高的SCA效应是本研究中直接开发的最佳组合。它还对重要字符铃数和铃重表现出显着的SCA效应，这是棉花育种中令人鼓舞的特征。

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