Vol. 10, Issue 11 (2021)

Author(s):
Anand Vardhan C, Subba Rao M and Gayathri NK

Abstract:
The contemporary study was organised to identify the potential maintainers/restorers of rice parental lines for CMS system in. During kharif 2019 seven WA-CMS lines were crossed to 33 elite lines. A total of 52 F₁s were evaluated during kharif 2020. Among these 13 F₁s recorded 100% pollen sterility, 27 F₁s recorded effective restorability (>75% spikelet and pollen fertility), 10 F₁s recorded partial restorability (50-75% pollen and spikelet fertility) and 2 F₁s (1-50% pollen and spikelet fertility) observed as partial maintainers. The male parents NTCN1, NTCN 107, NTCN112 and NTCN 120 can be developed into new CMS lines through recurrent back-cross breeding. The male parents NTCN22, NTCN37, NTCN52, NTCN57, NTCN58, NTCN72, NTCN118, NTCN151 and NTCN153 can be used to develop medium to long duration hybrids in rice.