Indexing

Characterization and Diversity Analysis of Rice Germplasm

Author: N. Naga Durga Rao, V. Roja*, M. Tushara, V. Satyanarayana Rao and V. Srinivasa Rao

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Abstract

Plant genetic resources are very important for crop improvement. The higher the variability, higher will be the chances of developing a character since the breeding programme requires much genetic variation for crop improvement. In the present study, genetic diversity of 30 rice germplasm was studied for agro-morphological characters based on 14 qualitative and 11 quantitative traits. Shannon weaver diversity indices for qualitative characters ranged from 0.21 to 0.90. High diversity index value (0.90) was exhibited by lemma tip color followed by decorticated grain shape, leaf senescence and decorticated grain color indicating that these characters are highly variable among the germplasm. The low value diversity index value (0.21) was exhibited by panicle characters namely, presence or absence of awns and its distribution, type of panicle exertion. Cluster analysis of rice germplasm based on qualitative characters grouped rice germplasm into five clusters with the maximum inter-cluster

Keywords

Shannon weaver diversity index, Principal component analysis, agro morphological characters, Cluster analysis.

Conclusion

Morphological variation does not always reflect real genetic variation because of interaction between genotype and environement, and the large unknown genetic control of polygenic, morphological and agronomic traits. Morphological traits are useful for preliminary evaluation because it is fast, simple, and can be used as a general approach for assessing genetic diversity among morphologically distinguishable cultivars.The present study revealed wide variation among the germplasm with respect to the morphological characters studied.

References

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How to cite this article

Rao, N.N.D., Roja, V., Tushara, M., Rao, V.S. and Rao, V.S. (2021). Characterization and Diversity Analysis of Rice Germplasm. Biological Forum – An International Journal, 13(3a): 170-179.