Genetic variability for different biometric traits in wheat (Triticum aestivum L.) under medium fertility conditions
Keywords: Wheat, Genetic variability, correlation coefficient, path analysis, biometric traits
AbstractThis study was carried out at CCS HAU, Regional Research Station, Bawal (Haryana) during rabi 2012-13 with 24 wheat genotypes to assess the genetic variability, correlation and path coefficient analysis under medium fertility conditions. Ten biometric traits viz., plant height (cm), spike length (cm), number of tillers per meter row, number of grains per spike, days to heading, days to maturity, 1000-grain weight (g), harvest index (%), biological yield (kg/plot) and grain yield (kg/plot). The higher phenotypic (PCV) and genotypic coefficients of variation (GCV) were exhibited by number of grains per spike, number of tillers per meter row, harvest index, biological yield, 1000-grain weight and grain yield. Moderate to high heritability coupled with high genetic advance as per cent of mean was observed for number of grains per spike, 1000-grain weight, grain yield, biological yield, number of tilers per meter row, harvest index and plant height, indicating the importance of these traits in selection and crop improvement. The genotypic correlation estimates showed significant positive association of grain yield with harvest index, 1000-grain weight, days to heading and maturity. Path coefficient analysis at genotypic level revealed high positive direct effect of harvest index and biological yield and negative direct effect by number of tillers per meter row on grain yield. Hence these are the main contributors to grain yield under medium fertility conditions.
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.