Comparative efficiency of pedigree, modified bulk and single seed descent breeding methods of selection for developing high-yielding lines in rice (Oryza sativa L.) under aerobic condition
Keywords: Rice, modified bulk, pedigree, single seed descent
AbstractThe knowledge about the relative efficiency of the different breeding methods may greatly help the plant breeder in selecting a
better method to be adopted in a particular crop. In the present experiment, the comparative efficiency of three selection
methods, viz., pedigree, modified bulk and single seed descent (SSD) were assessed in F3, F4, F5 and F6 generations of a cross
combination Moroberekan/IR20 of rice. Bulk population showed superiority over pedigree for grain yield, panicle length, number
of panicles, number of tillers and harvest index in F3 generation. Pedigree method was found to be superior over bulk and SSD
for grain yield per plant in F4 and F5 generations. In the three breeding methods, mean values of grain yield showed directional
shift across the generations. In F6 generation, the pedigree-derived lines showed higher superiority over mean value than lines
derived from SSD and modified bulk for grain yield, number of panicles and harvest index. No significant differences existed
between pedigree and modified bulk-derived F6 lines for grain yield and harvest index. Inter-generation correlation coefficients
were significant and positive between all the generations for grain yield, number of tillers and number of panicles. Significant
and positive correlations were observed between these three characters across generations supporting the intergeneration
correlation results. Visual selection based on the number of tillers and number of panicles per plant was very effective for
increasing yield in bulk and pedigree methods.
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.