Genetic variability studies on rice (Oryza sativa L.) mutants for yield and yield components in normal and saline stress soil
The present study was carried out to assess the genetic variability, heritability, genetic advance for yield and yield component characters in four hundred mutant lines of Rice. The crop was raised during kharif 2013 at Agricultural Research Station (ARS), Gangavathi, University of Agricultural Sciences, Raichur, Karnataka. The trials were set up in augmented design. Highly significant differences were observed for all the characters studied. Genetic variability parameters showed that phenotypic coefficient of variation (PCV) was higher than the respective genotypic coefficient of variation (GCV) and heritability is high for most of the characters. The characters studied in the present investigation expressed low to high heritability estimates ranging from 37.00 to 99.00 percent for normal soil and 52.00 to 99.00 percent for saline soil. High genetic advance as percent of mean along with high estimate of heritability and GCV are also observed for most of the characters. In normal soil, genetic advance was highest (190.58) for number of filled grains per panicle followed by number of grains per panicle (180.8) and lowest (4.47) for panicle length among yield characters. In case of saline soil, number of grains per panicle recorded highest (171.74) genetic advance followed by number filled grains per panicle (166.77) and the lowest (4.76) for per cent chaffyness. Biological yield, number of grains per panicle and number of filled grains per panicle are important in selection programmes aiming to improve rice yield and the breeder may consider these characters as the main selection criteria.
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.