IV. 8. Coordinator's Report: Chromosome 7.

George Fedak, Ottawa Research Station, Agriculture Canada, Ottawa, Ontario K1A OC6, Canada.

A telotrisomic for the short arm of chromosome 7 (telotrisomic 7S) has been isolated (Shahla and Tsuchiya, 1982a). It arose in the progeny of a plant with a chromosome constitution of 2n = 15 + 7S found in the F2 progeny from the cross 2n = 15 (trisomic 7) x yst3 - a yellow streak mutant (Shahla and Tsuchiya, 1982b). Triple 7S plants resemble normal diploids in morphology and seed fertility is 96.0% from selfing and 92.0% in crosses with diploids. The female transmission rate of the telocentric is 24.0%. At MI of meiosis Triple 7S, 47.2% sporocytes showed 1^III + 6^II + 52.8% showed 7^III + 1^I.

References:

Shahla, A. and T. Tsuchiya. 1982a. Cytogenetics of the telotrisomic for chromosome 7S in barley. Agronomy Abstracts, p. 83.

Shahla, A. and T. Tsuchiya. 1982b. Telotrisomic chromosome for the short arm of chromosome 7 (telo 7S) in barley. BGN 12:33.

BGN 13 toc
BGN Main Index