Characterisation, genetic parameters of variation and correlation studies in Molakolukulu Rice cultivars of Andhra Pradesh, India

Abstract

The present investigation was carried out to study the genotypic ad phenotypic coefficient of variation and character association in 25 molakolukulu rice genotypes. It revealed significant differences among the genotypes with respect to yield and quality. High PCV and GCV were recorded for gel consistency followed by alkali spreading value, zinc content and oil content, the estimates of heritability coupled with genetic advance as per cent of mean were high for the characters viz., plant height, flag leaf length, filled grains per panicle, gel consistency, iron content and oil content. Correlation studies revealed that filled grains per panicle and flag leaf breadth were found to possess significant positive association with grain yield per plant. Among the quality traits, alkali spreading value exhibited positive significant association with amylose content. Path analysis revealed that number of filled grains per panicle exhibited positive direct effect on grain yield per plant. Among the quality traits, alkali spreading value had positive direct effect on amylose content. Therefore, selection in favour of filled grains per panicle and flag leaf breadth would improve grain yield per plant. Alkali digestion values, on the other hand would be useful as a selection criterion for amylase content in molagolukulu rice.

Keywords

• variability
• correlation
• path analysis
• molagolukulu rice