Assessment of genetic variability in lowland rice varieties of Odisha
Abstract
The present study is carried out to establish the nature of relation between twelve component characters including grain yield by taking 64 low land rice varieties (including 55 landraces of Odisha). The analysis of variance revealed significant differences among the genotypes for all the characters studied, there by indicating the presence of abundant variability among the genotypes. Nature of relation between grain yield per plant and yield components were studied by partitioning the correlation coefficients into direct and indirect effects by using simple correlation and path analysis. In the present investigation, the estimation of genotypic correlation were higher than that of phenotypic correlation, which indicated that environmental cause of correlation has affected the genetic cause. The results indicated that grain yield per plant was positively correlated with fertile grains per panicle, grain fertility %, 100-grain weight and harvest index signifying the importance of such traits for realization of high yield in rice. As simple correlation does not provide the true contribution of the characters towards the yield, these genotypic correlations were partitioned into direct and indirect effects through path coefficient analysis. From the study of path analysis it was revealed that prime emphasis should be given to harvest index followed by number of fertile grains per panicle, grain fertility percentage and 100-grain weight for realization of high and stable yields. The value of residual effect was low (0.22) indicating that major component traits contributing to yield has been included in this study.
It is certified that:
- The corresponding author is fully responsible for any disputes arising due to the publication of his/her manuscript.
- The article has been seen by all the authors who are satisfied with its form and content.
- The sequence of names of authors in the by-line is as per their relative contribution to this experiment, giving due credit to all scientists who made notable contribution to it.
- All the authors fully understand that inclusion of any other co-authors or exclusion of any co-authors is not possible once the article has been submitted to the journal.
- The corresponding author takes full responsibility for this article.
- The address of the organization where the research was conducted is given.
- The article is exclusive for this journal, and the results reported here have not been sent (and will not be sent during its consideration by this journal) for publication in any other journal.
- Authors agree to abide by the objective comments of referees and do agree to modify the article into a short note as per the recommendation, for publication in the Electronic Journal of Plant Breeding.
- If published in Electronic Journal of Plant Breeding, the copyright of this article would vest with the Indian Society of Plant Breeders, who will have the right to enter into any agreement with any organization in India or abroad engaged in reprography, photocopying, storage and dissemination of information contained in it, and neither we nor our legal heirs will have any claims on royalty.
