长粒稻产量及影响产量性状的变异及关联研究

Sandhya Gudepu, Damodar Raju Chennamadhavuni, Sumalini Katragadda
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引用次数: 0

摘要

以30份粒长> 6.2mm的长粒稻为材料,包括knm118和IR 64两个检验,进行了产量和产量归因性状的变异、相关分析和通径分析。单株有效分蘖数、穗重、每穗粒数、千粒重和单株产量的变异幅度、PCV和GCV较高,单株有效分蘖数、株高、穗长、穗重、每穗粒数、千粒重、粒长、粒L/B比、粒长、粒L/B比和单株产量的遗传力和遗传进阶较高。其中,KPS 6363和KPS 3272具有较高的单株产量。相关分析表明,株高、穗重、粒宽与单株产量呈显著正相关。通径分析表明,单株有效分蘖数、株高、穗重和每穗粒数中,品质性状粒宽、粒L/B比、粒长和粒L/B比对单株籽粒产量有直接正向影响,其次是粒宽、株高、穗重、粒长和每穗粒数等性状可以作为高产水稻品种配合力的选择指标。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Variability and association studies for yield and yield contributing traits in long grain rice (Oryza sativa L.)
Thirty accessions of long grain rice with grain length > 6.2mm including two checks viz., KNM 118 and IR 64 were evaluated to study variability, correlation and path analysis for yield and yield attributing traits. High range of variation, PCV and GCV were observed for number of effective tillers per plant, panicle weight, number of grains per panicle, 1000-grain weight and grain yield per plant and high heritability coupled with high genetic advance was observed for number of effective tillers per plant, plant height, panicle length, panicle weight, number of grains per panicle, 1000-grain weight, kernel length, kernel L/B ratio, grain length, grain L/B ratio and grain yield per plant. Among all the entries tested KPS 6363 and KPS 3272 were found promising with higher grain yield per plant. Correlation analysis revealed that plant height, panicle weight, grain breadth exhibited a significant and positive association with grain yield per plant. Path analysis revealed that among quantitative traits number of effective tillers per plant, plant height, panicle weight and number of grains per panicle and quality traits kernel breadth, kernel L/B ratio, grain length and kernel L/B ratio had shown positive direct effect on grain yield per plant followed by kernel breadth, plant height, panicle weight, grain length and number of grains per panicle and these traits can be used as selection indices for development of high yielding rice varieties coupled with quality.
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