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首页> 外文期刊>African Journal of Biotechnology >Inheritance of okra leaf type in different genetic backgrounds and its effects on fibre and agronomic traits in cotton
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Inheritance of okra leaf type in different genetic backgrounds and its effects on fibre and agronomic traits in cotton

机译：秋葵叶片类型在不同遗传背景下的遗传及其对棉花纤维和农艺性状的影响

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Okra leaf (L0L0) cottons confer resistanceon-preference against insect pests. The inheritance of this trait was studied in three cross combinations involving a common okra leaf parent (HRVO-1) with three normal leaf (l0l0) parents (FH-1000, CIM-446 and Acala 63-74). The non-significant?c2?in F2?for leaf shapes in all the crosses fit well against the theoretical monohybrid ratio of 1:2:1 showing incomplete dominance. Observations of 1 okra leaf (L0L0) : 2 an intermediate class of sub-okra (L0l0) : 1 normal leaf (l0l0) were observed in the F2?populations of the three crosses. In the backcross generations with parent-I, ratios of 1 okra leaf : 1 sub-okra, leaf morphologies were obtained. Similarly, in the backcrosses with parent-II, ratios of 1 normal leaf : 1 sub-okra, an intermediate class of leaf shape were observed. The discontinuous variation for leaf shape in F2?generations of three crosses observed in the frequency distribution confirmed the qualitative inheritance for this trait. The incorporation of the gene for okra leaf type had no significant effect on the major fibre quality attributes like fibre length, fibre strength, lint percentage, fibre uniformity ratio and fibre fineness. Number of sympodial branches/plant, number of bolls/plant, boll weight and seed cotton yield/plant principal yield assuring traits showed improvement, with the incorporation of the gene for okra leaf type. The gene for okra leaf type can be incorporated in a genotype that covers the insect non-preference and yield enhancements without increasing number of monopodial branches. The justification for the increase in yield and its components is due to the okra leaf morphology conferring resistanceon-preference against insect pests with reduced leaf area allowing better air flow and maximum sunlight penetration through the leaves of the plant.
机译：秋葵叶（L0L0）棉花具有抗虫性/对害虫的非偏爱性。在三个交叉组合中研究了该性状的遗传，涉及普通秋葵叶亲本（HRVO-1）与三个正常叶（1010）亲本（FH-1000，CIM-446和Acala 63-74）。在所有杂交中，叶片形状的F2中不重要的c2与理论上的1：2：1单杂种比例完全吻合，显示了不完全的优势。在三个杂交的F2α种群中观察到了1片秋葵叶（L0L0）：2种亚秋葵（L0l0）的中间类别：1片正常叶（10l0）。在具有亲本I的回交世代中，获得了1片秋葵叶与1片秋葵的比例。类似地，在与亲本-II的回交中，观察到1个正常叶片与1个秋葵的比率，中间水平的叶片形状。在频率分布中观察到的三个杂交的F2代中叶片形状的不连续变化证实了该性状的定性遗传。秋葵叶型基因的掺入对主要的纤维品质属性如纤维长度，纤维强度，皮棉百分比，纤维均匀度比和纤维细度没有显着影响。随着秋葵叶型基因的掺入，of茎分枝数/植物数，棉铃数/植物数，棉铃重和种子棉产量/植物主产保证性状表现出改善。可以将秋葵叶类型的基因整合到一个基因型中，该基因型覆盖昆虫的非偏爱性并提高产量，而不会增加单脚类分支的数量。增加产量及其成分的理由是由于秋葵叶片形态赋予了对害虫的抗性/非偏爱性，叶面积减小，从而允许更好的空气流通和最大的阳光透过植物叶片的渗透。

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