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Inheritance of a 1BL/1RS Wheat-Rye Translocated Chromosome in Wheat

Dep. of Agronomy, Oklahoma State Univ., Stillwater, OK, 74078

^* Corresponding author.

In the Great Plains, winter wheat (Triticum aestivum L.) lines carrying the 1BS/1RL wheat-rye translocated chromosome are being used extensively in wheat breeding programs. This study was conducted to determine the influence of the 1BL/1RS chromosomone gametic transmission in adapted winter wheat backgrounds. Oklahoma experimental line OK83398 (‘Aurora’/2*TAM W-101) was crossed to both ‘Arkan’ and ‘Chisholm’. The F₂ plants were analyzed as to their chromosomal composition using the chromosomal N-banding procedure. In both crosses a significant deviation of a 1 homozygous 1B:2 heterozygous:1 homozygous 1BL/1RS ratio at the P = 0.05 level was observed. The transmission of gametes containing the 1BL/1RS translocated chromosome was observed to be reduced in F₁ hybrids in winter wheat backgrounds.

Key Words: Triticum aestivum (L.) Wheat-alien • N-banding • Transaction • Wheat-rye

Received for publication October 5, 1987.

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