Genetic variability and character association studies for quality attributing traits in rice (Oryza sativa L.)
Abstract
Twenty rice genotypes were evaluated for quality attributing traits in the agricultural farm of Uttar Banga Krishi Viswavidyalaya, Pundibari, Cooch Behar, in terai region of West Bengal. The study was conducted in two different environments pre-kharif and kharif seasons during 2017-18. Statistical analysis was performed for the assessment of genotypic coefficient of variation (GCV), phenotypic coefficient variation (PCV), broad sense heritability and genetic advance as percentage of the mean (GAM) for the quality attributing traits viz., kernel length, kernel breadth, l:b ratio of the kernel, kernel length after cooking, kernel breadth after cooking, amylose content, l:b ratio of the cooked kernel and linear elongation ratio. Analysis of variance, GCV and PCV revealed significant variation for different characters under study. Except for kernel length and kernel length after cooking all the characters under study showed high heritability coupled with high GAM. The genotypic correlation study revealed that the l:b ratio of the cooked kernel had a significant positive correlation with linear elongation ratio (LER), while kernel breadth after cooking had a significant negative correlation with LER. Path analysis study revealed that among all the characters, l:b ratio of cooked kernel showed a significant positive correlation with LER and kernel breadth after cooking showed a significant negative correlation with LER. Among the set of 20 genotypes, three were identified as medium slender, seven had medium grain, seven with short medium type and three had short slender grain. Three genotypes namely, Phougak, Phaourin Nakuppi and Chakhao Sempak were found with aroma.
Key words: GCV, PCV, h2, Genetic advance as percentage of mean, Correlation, Path, Grain quality traits, Rice
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.