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EVALUATION OF RICE GERMPLASM FOR HEAT TOLERANCE
M. MAAVIMANI, R. SARASWATHI, D. SASSIKUMAR

Published in: International Journal of Agriculture Sciences
Volume- 9, Issue-46, pp.4770-4774, Oct 2017
DPI :-> 16.10077.IJAS.2017.V9I46.47704774.2068



Abstract
An experiment was conducted by utilizing the existing 98 breeding materials derived from crosses involving heat tolerant donors as one of the parents. The aim of the study was to assess the degree of genetic diversity for yield and its related traits in order to identify high temperature tolerant lines that could be utilized in hybridization programme. The 98 genotypes were grouped into 13 diverse clusters. Cluster III with three genotypes viz., IR 86970 – 112 – 3, IR 86977 – 122 – 1 and IR 86991 – 103 – 2 involving three heat tolerant donors exhibited the maximum intra cluster distance of 162.33. The inter cluster distance was high between VI and XII (329.80), XIII and VI (265.50) and XII and V (263.45). Hybridization between the genotypes of these clusters and also between I and VI may offer scope for further selection. Total number of tillers per plant (44.03 %) and single plant yield (26.29 %) contributed more towards genetic divergence.

Key-Words / Index Term
Rice, High temperature, Genetic divergence, Global warming, Climate change

How to cite this article
M. MAAVIMANI, R. SARASWATHI, D. SASSIKUMAR , “EVALUATION OF RICE GERMPLASM FOR HEAT TOLERANCE”, International Journal of Agriculture Sciences, 9, Issue-46, pp.4770-4774, Oct 2017. DPI:16.10077.IJAS.V9.I46.2068