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Genetics of Panicle Exsertion in Cold‐Tolerant Rice ( Oryza sativa )
Author(s) -
Pandey D. K.,
Gupta H. S.
Publication year - 1993
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/j.1439-0523.1993.tb00610.x
Subject(s) - panicle , biology , oryza sativa , hybrid , cold tolerance , cultivar , horticulture , botany , agronomy , gene , genetics
Four cold‐tolerant rice varieties, viz. ‘Khonorullo’, ‘Namyi’, ‘Abor B’ and ‘Meghalaya‐1’ were crossed with two cold‐susceptible ones, viz. ‘Pusa 33’ and ‘Subhadra’ (DR92), in all possible combinations to study the inheritance of gene(s) governing panicle exsertion and their allelic relationship among cold‐tolerant varieties. F 1 hybrids of all the crosses showed complete panicle exsertion indicating dominance of this trait. Segregation pattern of panicle exsertion in F 2 and backcrosses show that all the four cold‐tolerant varieties possessed a single dominant gene designated as Ctr‐1. Absence of segregation for panicle exsertion in an F 2 generation obtained from intercrosses of cold‐tolerant varieties suggests that the dominant genes in all the four cultivars are allelic.