Studies on genetic diversity in rice TGMS lines

  • R. Rahul Roy Tamil Nadu Agricultural University


One hundred and nineteen rice temperature sensitive genetic male sterile lines (TGMS) were used to study the  magnitude of genetic diversity  for ten yield traits using Mahalanobis  D2 analysis.  Based on Torcher’s cluster analysis, the 119 genotypes were grouped into nine clusters.  Cluster I was maximum with 85 genotypes followed by cluster II with 15 genotypes and cluster III with 11 genotypes,.  The clusters namely IV, VI, VII, VIII, and IX were solitary clusters with one genotype each. The maximum  inter cluster distance was  observed with clusters V and IX followed by cluster V and VIII which indicates the  genotypes present  in these cluster having  more divergence.  The highest intra cluster distance was observed in cluster III (22.08). Among the traits, number of grains per panicle (49.76 %) followed by number of productive tillers (23.43%), spikelet fertility (14.46%) and pollen fertility (9.93%) exhibited maximum contribution towards total divergence among the genotypes studied. Hence, these characters could be given importance for selection of genotypes for further crop improvement program.

Author Biography

R. Rahul Roy, Tamil Nadu Agricultural University


Research Note