Genetic analysis of fertility restoration under CGMS system in rice (Oryza sativa L.) using three-way test-cross method

Journal of genetics

Swaminathan Manonmani¹  Philip Shalini¹  Sabariappan Robin1¹ 

[1] Centre for Plant Breeding and Genetics, Tamil Nadu Agricultural University, Coimbatore 641 003, India$$

关键词: rice;    heterosis;    three-way test cross;    fertility restoration genetics.;   

DOI  :  

学科分类：生物科学（综合）

来源: Indian Academy of Sciences

【 摘 要 】

We studied the genetics of fertility restoration by producing three-way test cross (TWTC) hybrids involved different combinations of restorers, maintainers and partial restorers of rice. Pollen and spikelet fertility of 16 TWTC hybrids were studied. Six TWTC involving restorer/restorer combinations as male parents produced progenies with fertility levels ranging from complete to zero. No specific ratio of segregation was observed. The crosses involving maintainer/maintainer combinations as male parents showed fully fertile and partial fertile/sterile plants in their progenies. These could be due to nonallelic gene interactions for fertility restoration between the two restorer or maintainer parents, or due to the influence of some modifying genes in the nuclear genome. TWTC involving partial restorer / restorer and partial restorer/partial restorer as the male parents also produced fully fertile and partial fertile/sterile plants suggesting the complex genetics of fertility restoration in rice. There were no previous results depicting the complementation effects of maintainers for fertility restoration.

【 授权许可】

Unknown