Path Coefficient Analysis and Correlation for some Yield and its Attributes in Rice (Oryza sativa L.)

Abstract

Yield and its components traits of rice varieties were studied to estimate the relationship between grain yield and its components. Sixty rice genotypes were used in this research. A field experiment was conducted in a randomized complete block design with three replications at Sakha Agricultural Research Station, Kafr elsheikh, Egypt during 2017 and 2018 seasons. The results revealed that the Giza 178, GZ 9399-4-1-1-3-2-2 and Giza 177 exhibited the highest values of no.of filled grains panicle and grain yield t/ha. The mean square analysis for the rice genotypes was highly significant for all studied traits, indicating that the differences among the rice genotypes and their traits. Chlorophyll content, flag leaf area, number of panicles plant, panicle length and number of filled grains panicle showed positive direct effect on grain yield, while, rest of traits showed negative effect on grain yield. This indicates that more number of filled grains panicle is a highly reliable component of grain yield. Another important character with direct effect on grain yield is number of panicles plant and flag leaf area which showed positive direct effect on grain yield. Hence, number of panicles and filled grains panicle should be given a prior attention in rice improvement program because of their major influence on yield. Highly significant and positive correlations were found between grain yield and each of no.of panicles plant, panicle length, no.of filled grains panicle and 1000-grain weight.