Abstract
In order to determine the associations among yield components and their direct and indirect influence on grain yield of rice, an experiment was conducted. For this purpose, 30 genotypes collected from different sources were tested in a randomized complete block design. The phenotypic correlations among the yield traits and their path coefficient were estimated. Grain yield was significantly correlated with its component characters; number of productive tillers per plant, number of grains per panicle and flag leaf area. Path analysis revealed that days to maturity had the highest direct effect (0.751) on grain yield per plant. In addition, the yield components had positive direct effect on grain yield except the days to heading (-0.834). The order of yield components was the number of productive tillers per plant, flag leaf area and 1000 grain weight. The improvement in grain yield will be efficient if the selection is based on biological yield components, number of productive tillers per plant and flag leaf area. These traits may also be utilized in pure line selection. Key words: Rice (Oryza sativa), path coefficient, phenotypic correlation, yield components.
Highlights
Among the cereals, rice share equal importance as leading food sources for mankind
Grain yield was significantly correlated with its component characters; number of productive tillers per plant, number of grains per panicle and flag leaf area
The improvement in grain yield will be efficient if the selection is based on biological yield components, number of productive tillers per plant and flag leaf area
Summary
Rice share equal importance as leading food sources for mankind. Rice is a staple food for nearly half of the world’s population. It has an immense economic value which greatly strengthens our national economy. Rice in Pakistan’s agrarian economy plays multifarious roles. It is the second staple food; secondly, rice industry is an important source of employment and income for rural masses and thirdly, it contributes in the foreign exchange exchequer. The need and importance of rice is increasing day by day due to the increase in human population pressure on the earth. Improving the productivity of rice would contribute to hunger eradication, poverty alleviation, national food security and economic development
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