Journal of Progressive Agriculture

Open Access
  • Year: 2014
  • Volume: 5
  • Issue: 1

Studies on gene action and combining ability in thermosensitive genic male sterile lines and two-line hybrids in rice

  • Author:
  • Rishika Sharma1, Suneeta Pandey2
  • Total Page Count: 4
  • DOI:
  • Page Number: 17 to 20

1Department of Genetics and Plant Breeding, G. B. Pant University of Agriculture and Technology, Pantnagar (U.S.Nagar), Uttarakhand

2Department of Plant Breeding and Genetics, JNKVV, Jabalpur (M.P)

Abstract

Seventy hybrids evolved from crossing 14 TGMS (Thermo Sensitive Genic Male Sterile) lines and five testers in a line × tester mating design were evaluated for combining ability. Both additive and non-additive gene actions were preponderant for different quantitative traits. Among lines, UPRI 99–791 and UPRI 99-60-2, while among testers Pant Dhan 4 were found to be the best general combiners for yield contributing characters. There was lack of correspondence between the per se performance and combining ability of parents in the present investigation. Eight cross combinations exhibited high sca (specific combining ability) effects for grain yield per plant involving at least one parent with high gca (general combining ability) status and other with low gca status indicating the involvement of additive as well as non-additive gene actions operating in these crosses.

Keywords

Rice, line × tester, gene action, combining ability and TGMS