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

Shalini, P. and Swaminathan, M. and Robin, S. (2015) Genetic analysis of fertility restoration under CGMS system in rice (Oryza sativa L.) using three-way test-cross method. Journal of Genetics, Vol. 94, No. 1, March 2015, 94 (1). pp. 9-16.

[img] PDF - Published Version
Restricted to ICRISAT researchers only
Request a copy

Abstract

We studied the genetics of fertility restoration by producing three-way test cross (TWTC) hybrids involved different combi- nations 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 par- ents 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.

Item Type: Article
Uncontrolled Keywords: Rice; heterosis; three-way test cross; fertility restoration genetics
Author Affiliation: Centre for Plant Breeding and Genetics, Tamil Nadu Agricultural University, Coimbatore 641 003, India
Subjects: Crop Improvement
Divisions: Other Crops
Depositing User: Mr T L Gautham
Date Deposited: 04 Mar 2019 03:59
Last Modified: 04 Mar 2019 03:59
URI: http://eprints.icrisat.ac.in/id/eprint/15844

Actions (login required)

View Item View Item
EPrints Logo
eprints is powered by EPrints 3 which is developed by the School of Electronics and Computer Science at the University of Southampton. More information and software credits.