Vol. 6, Issue 5 (2017)
Associations study of salt affected rice (Oryza sativa L.)
Author(s): BK Maurya, PK Singh, OP Verma and DK Mandal
Abstract: Rice (Oryza sativa) is the principal food crop of about half of the people of the world. It is the world’s third largest crop after maize and wheat. The importance of rice is not only as a fundamental commodity and primary food source for more than half of the world’s population, but also as emerges from the complex rice based ecosystems that influence issues of global concern such as food security and development. Dynamic era of agricultural development and rapidly changing climatic conditions necessitate to continuous evaluation of rice germplasm and local rice land races. In this regards the present investigation was comprised of 30 lines of rice Germplasm along with three checks viz., Narendra Usar 3, Sarjoo 52 and IR 28. The material, comprising indigenous as well as exotic germplasm lines, exhibited wide spectrum of variation for various agronomic and morphological characters. In the present study, phenotypic and genotypic correlations were computed between twelve characters in sodic soil. The grain yield per plant exhibited a very strong positive association with biological yield per plant, followed by grains per panicle, spikelets per panicle and panicle bearing tillers per plant at phenotypic as well as genotypic levels. Thus, biological yield per plant, grains per panicle, spikelets per panicle and panicle bearing tillers per plant emerged as most important associates of grain yield per plant in rice. However, grain yield per plant had strong negative association at genotypic and phenotypic levels with days to 50% flowering. The path-coefficient analysis was carried out by using phenotypic as well as genotypic correlation coefficients between twelve characters to resolve direct and indirect effects of different characters on grain yield per plant. At phenotypic as well as genotypic levels, biological yield per plant exhibited very high positive direct effect on grain yield per plant, followed by harvest index. The high direct effect of biological yield per plant possessing highly significant positive association with grain yield per plant, highlighted the importance of this trait for rice improvement.
How to cite this article:
BK Maurya, PK Singh, OP Verma, DK Mandal. Associations study of salt affected rice (Oryza sativa L.). J Pharmacogn Phytochem 2017;6(5):843-847.