Indian Society of Genetics & Plant Breeding

Important

STUDIES ON SCREENING AND GENETICS OF WIDE COMPATIBILITY IN RICE (ORYZA SATIVA L.)

Published on

The hybrids of intersubspecific crosses involving indica (I) and japonica (J) rices show
semisterility, while those with wide compatible varieties (WCVs) show normal fertility.
A set of 42 varieties representing four varietal groups were evaluated in two diverse
environments in testcrosses with three indica and japonica testers each for wide
compatibility trait and its inheritance. and relationship with the marker gene in four
newly identified varieties were studied. Twelve varieties were identified as compatible,
two intermediate and 28 narrow compatible varieties. Inheritance of WC in RP
1579-1704-1318, UPR 1279-1-4-1, Pusa 560-2-203-338 and UPRI-95-170 was controlled
by single gene with dominance of wide compatibility over narrow compatibility. Wide
compatibility gene (S~ ) showed loose linkage with chromogen (C+) gene on chromosome
6 with a recombination value of 34.2%.
 

Keywords: Rice, hybrid sterility, inheritance, wide compatibility genes, wide. cross

Info

Year: 1999
Volume: 59
Issue: 3
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

Authors

info_circle

Download PDF