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Cytogenetics of a Crown Rust‐Resistant Hexaploid Oat with 42 + 2 Fragment Chromosomes 1
Author(s) -
Dherawattana A.,
Sadanaga K.
Publication year - 1973
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1973.0011183x001300060002x
Subject(s) - biology , rust (programming language) , backcrossing , avena , homologous chromosome , genetics , centromere , botany , chromosome , gene , programming language , computer science
Twenty‐two bivalents were observed in X117 oat ( Avena sativa L.), a isogenic line resistant to crown rust ( Puccinia coronata Cda. avenae Fraser and Led.), and with 42 + 2 fragment chromosomes. The homologous fragment chromosomes are either telocentric or acrocentric. Transmission through the egg, calculated from the backcross data, was 18.2%. A dominant gene, Pc ‐15, conferring resistance to races 264 and 290 of crown rust of oats is located on each of the fragments.