Vol. 11, Issue 4 (2022)

Author(s):
Shivam Dubey, OP Verma, Vishal Singh, Vinod Singh and Virendra Bahadur

Abstract:
Genetic variability, heritability and genetic advance were studied in seventy four diverse rice genotypes including four checks at three different farm with Sodicity and normal levels i,e.pH-8.6 (Student instructional farm), 9.5 (Main experiment station) and 7.8 (Crop Research Station Masodha) during kharif 2020 following randomized complete block design. A collection of diverse genotypes were evaluated for certain physiological traits viz., days to 50% flowering, plant height (cm), flag leaf area (cm), biological yield per plant(g), harvest index%, chlorophyll content, leaf nitrogen, leaf temperature and grain yield per plant (g.). The analysis of variance revealed highly significant differences among all the genotypes for all the traits. The estimates of genetic coefficient of variation (GCV) and phenotypic coefficient of variation (PCV) indicated the presence of considerable amount variability for all the traits at three locations. In general the estimates of phenotypic coefficient of variability were higher than genotypic coefficient of variability. A high estimate of heritability was found for all parameter. The presence of high heritability coupled with high genetic advance in majority of the traits indicated the preponderance of additive gene action. So, these traits can be improved through direct selection. The moderate broad sense heritability with low genetic advance in percent of means were observed for leaf temperature indicating presence of non-additive gene action suggesting heterosis breeding may be useful for rice improvement in sodic soil. The overall result indicates the presence of enough variability for development of improved rice varieties and these traits can be used for selection further the experiment should be repeated by integrating more number of important traits in representative sodic areas of the country.