Fertility Expression of TGMS-Genes in the Backgrounds of indica CMS-lines, B-lines and R-lines of Hybrid Rice

• Published in: Rice science Vol. 13; no. 4; pp. 243 - 249
• Main Author: WANG Ji-feng Lu Zuo-mei
• Format: Journal Article
• Language: English
• Published: Rice Research Institute, Guizhou Academy of Agricultural Sciences, Guiyang 550006, China%State Key Laboratory of Crop Genetics Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, China 2006; State Key Laboratory of Crop Genetics Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, China
• Subjects: TGMS基因; 恢复系; 杂交稻; 籼型CMS系; 育性表达; 遗传背景; 雄性不育基因; restorer gene; three-line system; thermo-sensitive genic male sterility-gene; genetic background; gene expression
• ISSN: 1672-6308; 1876-4762

The generation fertility of 51 F1, 19 F2 and 6 BC1 between 3 thermo-sensitive genic male sterile lines （TGMS-lines） Pei＇ai 64S, 6311S and 360S, and the three lines of hybrid rice including 7 indica cytoplasmic male sterile lines （CMS-lines） and their corresponding maintainer lines （B-lines） and 3 indica restorer lines （R-lines） were investigated to study the expression of TGMS-genes in the backgrounds of the three lines of hybrid rice. Pei＇ai 64S has stronger fertility restoring （Rf） genes for CMS-lines and its TGMS trait is governed by 2 pairs of independent recessive genes; The TGMS trait of 6311S is governed by a single recessive gene with weaker Rf-gene in 6311S and the TGMS trait of 360S is governed by a single recessive gene with no Rf-gene in 360S. The investigation on the fertility of F1 plants between 5 CMS-lines and 4 TGMS generations selected from F2 plants of 4 CMS-lines x 6311S confirmed that the expression of TGMS-gene was controlled by Rf-gene in the genetic background of cytoplasm of CMS-lines, but not affected by Rf-gene in the genetic background of normal fertile cytoplasm. The potential breeding strategies of TGMS-lines with cytoplasm of CMS-lines and CMS-lines with the nucleus of TGMS-genes were discussed.