II. 13. Acrotrisomic 5L^5S in barley. (1)
Azizeh Shahla and T. Tsuchiya, Department of Agronomy, Colorado State University, Fort Collins, CO 80523 U.S.A.

(1) Supported in part by USDA/SEA Competitive Research Grant 82-CRCR-1-1020 and CSU Hatch project.

A new acrotrisomic line was found in chromosome 5 in the progeny of acrotrisomic 5S^5L (Shahla and Tsuchiya, 1983). Giemsa banding technique showed that the long arm (5L) broke at the same place as the acrocentric chromosome 5S^5L; the breakage was distal to the band. The break in the short arm (5S) was also distal to the centromeric band (Fig. 1).

Fig. 1. Karyotype of a Giemsa N-banded cell of Triplo 5L^5S

The trisomic plant showed similar morphological characteristics to primary trisomic (Triplo 5L) and acrotrisomic 5S^5L with extremely revoluted leaves.

Reference:
Shahla, A. and T. Tsuchiya. 1983. Further studies on acrotrisomic for 5S^5L (Formerly meta lA) in barley. BGN 13:23-24.
 

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