II.29 Telotrisomics in the progeny of primary trisomic for chromosome 3 (Pale).
T. Tsuchiya. Agronomy Department, Colorado State University, Fort Collins, Colorado 80521, U.S.A.
A new telotrisomic plant was obtained in the progeny of a cross between
Tri 3 and a short-awned mutant (Kmut 200). Twenty-one crossed seeds germinated
gave the following results: 13(2n=14), 7(2n=15) and 1(14+1 telocentric).
The characteristics of the telotrisomic were very similar to that of the
primary trisomic with pale green plant color and revoluted and drooping
leaves with abundant hair on the surface. The fertility was relatively
high with 67.6% in selfing and 100% in 2x + 1 telo x 2x. The transmission
rate was 29.7% in the selfed progeny. Based on the morphological similarity
to the primary trisomic for chromosome 3, this telotrisomic was tentatively
named as Telo 3A. Cytological and genetic identification will be made with
the use of RT tester and genetic marker stocks.
Reports II.29 (P. 58) through II.39 (P. 66) by T. Tsuchiya and coworkers are based on the results of researches supported partly by NSF Research Grant GB 4482 X.