Genetic diversity analysis in radiation induced small grain mutants of rice (Oryza sativa)

P  ARUNACHALAM; C  VANNIARAJAN; J  SOUFRAMANIEN; R  LALITHA; S  PALANIYAPPAN

doi:10.56093/ijas.v94i12.143632

Authors

P ARUNACHALAM Agricultural College and Research Institute (Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu), Madurai, Tamil Nadu
C VANNIARAJAN Anbil Dharmalingam Agricultural College and Research Institute (Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu), Tiruchirappalli, Tamil Nadu
J SOUFRAMANIEN 3Bhabha Atomic Research Centre, Mumbai, Maharashtra
R LALITHA Pushkaram College of Agriculture Science (Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu), Pudukkottai, Tamil Nadu
S PALANIYAPPAN Adhiyaman College of Agriculture and Research (Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu), Hosur, Tamil Nadu

https://doi.org/10.56093/ijas.v94i12.143632

Keywords:

Electron beam, Genetic diversity, Grain size, Gamma rays, PCA, Rice

Abstract

Present study was carried out during rainy (kharif) 2018 and winter (rabi) seasons of 2018–19 at Agricultural College and Research Institute (Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu), Madurai, Tamil Nadu aimed to understand extent of genetic diversity among small grain mutants and group them by multivariate analysis to excise further selection for grain quality and grain yield improvement. The small grain mutants were grouped into 10 clusters based on genetic diversity by D² values. The maximum cluster distance was estimated between cluster IX and cluster VIII and least inter cluster distance was obtained between cluster V and cluster X. After early generation selection of mutants for small grain size and early maturity; from remaining variability, the trait grain yield/plant contributed maximum to genetic diversity. Which offers scope for selecting high yielding genotypes with reduced grain size. The high positive values of the co- efficient of the vector were obtained from the total tillers/ plant, number of productive tillers, plant height at maturity, number of grains/panicle, and number of filled grains/ panicle from PC 1 and PC 2. Grouping based on PC 1 and PC 2 biplots helps to understand the contribution of traits to each group of genotypes. The information derived from this study will help to develop rice cultivars with improved grain quality and grain yield.

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References

Fitzgerald M, Mc Couch S and Hall R D. 2009. Not just a grain of rice: The quest for quality. Trends in Plant Science 14: 133–39.

Maji A T and Shaibu A A. 2012. Application of principal component analysis for rice germplasm characterization and evaluation. Journal of Plant Breeding and Crop Science 4: 87–93.

Pachauri A K, Sarawgi A K, Bhandarkar S and Ojha G C. 2017. Agro-morphological characterization and morphological based genetic diversity analysis of rice (Oryza sativa L.) germplasm. Journal of Pharmacognosy and Phytochemistry 6(6): 75–80.

Palaniyappan S, Arunachalam P, Banumathy S, Mini M L and Muthuramu S. 2020. Genetic divergence and clustering studies in advanced breeding lines of rice (Oryza sativa L.). Electronic Journal of Plant Breeding 11(2): 499–504.

Rao C R. 1952. Advanced Statistical Methods in Biometric Research, pp. 351–82. John Wiley and Sons, New York, USA.

Sathish V and Senapati B K. 2017. Principal component analysis of morphological and yield attributing traits in advanced breeding lines of rice grown at rainfed shallow lowland condition of West Bengal. International Journal of Biological Research and Development 7(5): 265–70.

Shomura A, Izawa T, Ebana K, Ebitani T, Kanegae H, Konishi S and Masahiro Yano. 2008. Deletion in a gene associated with grain size increased yields during rice domestication. Nature Genetics 40(8): 1023–28.

Tenorio F A, Ye C, Redona E, Sierra S and Laza M. 2013. Screening rice genetic resources for heat tolerance. SABRAO Journal of Breeding and Genetics 45(3): 371–81.

Zahan M I, Bhuiyan M S R and Hossain M S. 2008. Genetic divergence in Oleiferous brassica species. Journal of Sher-e- Bangla Agricultural University 2(1): 1–6.