Genetic variability in heat tolerant maize (Zea mays L.) hybrids and their parents for yield and grain quality traits

International Journal of Agricultural and Applied Sciences Pub Date : 2022-12-20 DOI:10.52804/ijaas2022.329

A. Ashwini, H. Sowmya, P. Kuchanur, R. Beladhadi, R. Lokesha, A. Patil, P. Zaidi, M. Vinayan, K. Seetharam

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Abstract

The present investigation was carried out to estimate genetic variability, heritability and GAM in inbred lines and hybrids. ANOVA indicated the availability of considerable variation for all the characters among inbred lines and hybrids except for ASI. PCV was higher than the GCV for all the characters. In inbred lines, important traits like plant height, number of grains per row, number of grains per cob, 1000-grain weight, grain yield per plant, dietary fibre, and β-carotene exhibited high PCV and GCV along with high heritability and GAM. Whereas, hybrids showed high values of PCV and GCV for ASI, phytic acid and high heritability coupled with high GAM were observed for traits like ASI, plant height, number of grains per row, number of grains per cob, shelling percentage, grain yield per plant, protein, dietary fibre, and β-carotene indicating the presence of variability in inbred lines and hybrids for these traits. Hence, simple selection for these traits in early generations for developing heat-tolerant maize lines can be practised.

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耐热玉米(Zea mays L.)杂种及其亲本产量和品质性状的遗传变异

本研究对自交系和杂交种的遗传变异、遗传力和GAM进行了估计。方差分析表明，在自交系和杂交系中，除ASI外，其他性状均存在较大的变异。所有性状的PCV均高于GCV。在自交系中，株高、单行粒数、每穗轴粒数、千粒重、单株粒产量、膳食纤维、β-胡萝卜素等重要性状均表现出较高的PCV和GCV，并具有较高的遗传力和GAM。然而，杂交种在ASI方面表现出较高的PCV和GCV值，在ASI、株高、行粒数、每穗轴粒数、脱壳率、单株粒产量、蛋白质、膳食纤维和β-胡萝卜素等性状上观察到植酸和高遗传力以及高GAM，表明这些性状在自交系和杂交种中存在变异性。因此，可以在早期世代对这些性状进行简单选择，以培育耐热玉米品系。

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International Journal of Agricultural and Applied Sciences

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