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首页> 外文期刊>Crop Research >Analysis of combining ability and heterotic groups of white grain quality protein maize (QPM) inbreds
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Analysis of combining ability and heterotic groups of white grain quality protein maize (QPM) inbreds

机译：白粒优质蛋白玉米自交系的配合力与杂种优势分析

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Information on the combining ability and heterotic patterns of maize germplasm is great value to maize breeders. The objective of this study is to determine the heterosis and combining ability of seven yellow University Maize Inbreds (UMI) as lines and five Quality Protein Maize as testers (QPM) lines in a line x tester fashion to understand the genetic architecture, breeding behaviour, recombination potential and prediction of progeny performance. Significant differences among the hybrids were observed for all the 18 characters indicating the existence of genetic variability. The line x tester analysis revealed the importance of dominance gene action for all the characters. Parents CML 144, CML 145 in lines and UMI 524 in testers have superior gca effects and per se performance. On the basis of per se performance, sca effects and standard heterosis the hybrids CML 145/UMI 189, CML 146/UMI 427, CML 147/UMI 427 and CML 147/UMI 426 appeared to be best for heterosis breeding. Evaluation of hybrids based on significant gca and non-significant sea resulted in the identification of CML 143/UMI 427, CML 144/UMI 524, CML 145/UMI 189, CML 145/UMI 427, CML 145/UMI 524, CML 146/UMI 189 and CML 147/UMI 524 as worthy genotypes for commercial exploitation and further utilization in recombination breeding programmes. Maximum desitrable heterosis over mid-parent was observed for b carotene (78.68%), tryptophan (62.07%) followed by single plant grain yield (56.61%). For heterosis over better parent was observed for protein (54.47%), beta carotene (78.68%) followed by single plant grain yield (59.99%). Among the hybrids, CML 143 x UM1189 recorded highly significant standard heterosis for carotene (41.66), lysine (13.29) and tryptophan (34.29) and also this hybrid was considered to be the best one for moderate yield (31.25%) and moderate starch (4.92) and low protein (1.63%), which indicates that heterosis in general, can be commercially exploited especially in maize to improve nutritional qualities alongwith yield to suit the farmers. So, exploitation of heterosis is the best method to increase the qualitative like lysine and tryptophan alongwith increase in the grain yield in maize.
机译：有关玉米种质的结合能力和杂种方式的信息对玉米育种者具有重要价值。这项研究的目的是以线x测试仪方式确定7个黄色大学玉米自交系（UMI）和5个优质蛋白质玉米测试仪（QPM）系的杂种优势和结合能力，以了解其遗传结构，繁殖行为，重组潜力和后代表现的预测。在所有18个字符中观察到杂种之间的显着差异，表明存在遗传变异性。 line x tester分析揭示了主导角色对所有角色的重要性。测试仪中的父级CML 144，CML 145和UMI 524具有出色的gca效果和出色的性能。基于本身的性能，Sca效应和标准杂种优势，杂种CML 145 / UMI 189，CML 146 / UMI 427，CML 147 / UMI 427和CML 147 / UMI 426似乎是杂种育种的最佳选择。基于显着gca和非显着海的杂交种的评估导致鉴定出CML 143 / UMI 427，CML 144 / UMI 524，CML 145 / UMI 189，CML 145 / UMI 427，CML 145 / UMI 524，CML 146 / UMI 189和CML 147 / UMI 524是有价值的基因型，可用于商业开发以及在重组育种计划中进一步利用。观察到β-胡萝卜素（78.68％），色氨酸（62.07％），单株植物籽粒产量（56.61％）超过中亲本的最大可欲杂种优势。对于杂种优势而言，蛋白质（54.47％），β-胡萝卜素（78.68％），单株谷物产量（59.99％）高于亲本。在杂种中，CML 143 x UM1189记录了胡萝卜素（41.66），赖氨酸（13.29）和色氨酸（34.29）的高度显着标准杂种优势，并且该杂种被认为是中等产量（31.25％）和中等淀粉（ 4.92％）和低蛋白（1.63％），这通常表明杂种优势可以在商业上利用，尤其是在玉米中，以提高营养品质以及适合农民的单产。因此，利用杂种优势是提高赖氨酸和色氨酸等定性品质以及提高玉米产量的最佳方法。

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