Genetic Divergence Analysis for Early Maturity, Yield and Yield Attributing Traits in Elite Rice (Oryza sativa L.) Germplasm

Author: B. Pragathi and G. M. Lal

Download PDF

Abstract

Thirty-six genotypes of rice were imperiled to Mahalanobis’s D2 analysis to appraise the genetic diversity. All these entries were classified into five clusters with maximum intra cluster distance for cluster III (153.89). The maximum distance (intercluster) between cluster II and V (658.46 cm) followed by 632.32 cm (cluster II and IV), 577.58 cm (cluster III and V), 565.13 cm (cluster I and V) and 465.78 cm (cluster II and III). Least inter cluster distance was detected for cluster I and II (241.78 cm). Among the thirteen characters studied days to attain 50% flowering (21.9%), spikelets/panicle (17.43%), test weight (15.86%) and harvest index (15.00%) were the foremostsponsors towards divergence and accounted for about 70.19% of contribution towards total divergence.

Keywords

Rice, D2 analysis, Genetic divergence, Inter and Intra cluster distance.

Conclusion

Cluster analysis revealed that there was a lot of variation between germplasm lines in different clusters for different characteristics in the studied population. Recombination breeding between germplasm lines belonging to Cluster III, which has the shortest intra-cluster distance, can increase yield potential.Because the longest inter-cluster distance was seen between cluster II and V, cluster II and IV, cluster III and V, cluster I and IV, and cluster III and V, taking into consideration crosses involving genotypes from these clusters would promote extensive and desirable recombination in segregating generations.

References

-

How to cite this article

Pragathi, B., Lal, G. M. (2021). Genetic Divergence Analysisfor Early Maturity, Yield and Yield Attributing Traits in Elite Rice (Oryza sativa L.) Germplasm. Biological Forum – An International Journal, 13(3): 501-505