IV. 10. Trisomic and aneuploid stocks. (1)
T. Tsuchiya, Department of Agronomy, Colorado State University, Fort Collins, Colorado 80523. U. S. A.
(1) Supported by USDA-CSU Cooperative Research Grant 58-9AHZ-2-265 (12-14-5001-265) and Colorado State University Hatch Project.
More trisomics and other aneuploid lines have been obtained from experiments with various trisomics. In addition to four complete sets of primary trisomics, 11 telotrisomics including all seven barley chromosomes are in stock now, although some telotrisomics are still in hybrid condition.
The number of acrotrisomics with cytologically identified extra acrocentric chromosomes is seven (Triplo lLlS, 3L3S, 4L4S, 5S5L, 5L5S, 6S6L, 7S7L).
Trisomics with extra metacentric or other fragments are also available for chromosomes 1, 3, 4, and 6. Many other trisomics with various types of extra fragment chromosomes are yet to be studied for their identification and designation.
Most of the trisomics and aneuploids maintained in this center are obtained in our laboratory. No stocks have been received from other workers, though all workers are assumed to send their trisomics and other aneuploid stocks after their identification is made.