Cytogenetics of a Crown Rust‐Resistant Hexaploid Oat with 42 + 2 Fragment Chromosomes1

1973/11/01 by A. Dherawattana, K. Sadanaga · 8 citations
Agricultural and Biological Sciences · Biochemistry, Genetics and Molecular Biology · #Wheat and Barley Genetics and Pathology #Genetic Mapping and Diversity in Plants and Animals #Plant Disease Resistance and Genetics

paper · doi:10.2135/cropsci1973.0011183x001300060002x

Abstract

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.

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