Inheritance of thermo-sensitive genic male sterility in rice

Latha, R. and Thiyagarajan, K. and Senthilvel, S. (2003) Inheritance of thermo-sensitive genic male sterility in rice. Journal of Genetics & Breeding, 57. pp. 89-91.

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Abstract

The inheritance of thermo-sensitive genic male sterility in the TMGS lines viz. TS 6, TS 16, TS 18, TS 29, TS 46 and TS 47 was studied using Fl' F2 and test cross generations of the crosses between TGMS lines and non-TGMS male fertile genotypes viz. IR 68281B and MRST9. All the Fjs were fertile and segregration of pollen fertility in F2 and test cross generations involving TS 6 and TS 29 was in the ratio of 3 fertile: 1 sterile and 1 fertile: 1 sterile, respectively. This indicated that the TGMS trait in these two lines was controlled by single recessive gene. Segregation for fertility in F2 and test cross generations of the other TGMS lines viz: TS 16, TS 18, TS 46 and TS 47 was in the ratio of 15 fertile: 1 sterile and 3 fertile: 1 sterile, respectively. This showed that double recessive genes with duplicate interaction controlled the TGMS in these lines. However, these lines were derived from Nolin .PL 12, in which the TGMS was reported to be inherited as single recessive. The deviation may be due to the significant influence of genetic background on the expression of TGMS or due to the presence of strong fertility modifier complex in their pollen parents, which could mask the effect of TGMS genes.

Item Type:	Article
Uncontrolled Keywords:	Genetics, Oryza sativa, TGMS
Author Affiliation:	Centre for Plant Breeding and Genetics, Tamil Nadu Agricultural University, Coimbatore - 641 003, India
Subjects:	Crop Improvement > Genetics/Genomics
Divisions:	Other Crops
Depositing User:	Sandhya Gir
Date Deposited:	09 Sep 2011 09:10
Last Modified:	09 Sep 2011 09:10
URI:	http://eprints.icrisat.ac.in/id/eprint/2627

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