BGN 14: Telotrisomic for the short arm of chromosome 5 (5S) in barley BARLEY GENETICS NEWSLETTER, VOL. 14, II. RESEARCH NOTES
Shahla & Tsuchiya, pp. 11-12

II. 6. Telotrisomic for the short arm of chromosome 5 (5S) in barley. (1)

Azizeh Shahla and T. Tsuchiya. Department of Agronomy, Colorado State University, Fort Collins, Colorado 80523 U.S.A.

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

Furst and Tsuchiya (1983) reported on the possible telotrisomic for chromosome 5S with some doubts of the telotrisomic being Triplo 3L because of morphological characteristics. The somatic chromosomes of this telotrisomic were studied by Giemsa N-banding method. The telocentric chromosome clearly showed a typical banding pattern of the short arm of chromosome 5 (5S) with a heavy band at the centromeric region.

It is important to confirm the true nature of this telocentric chromosome genetically. The telotrisomic 5S will be crossed with Hordeum spontaneum which is resistant to most of the powdery mildew races. Once a telotrisomic line resistant to many powdery mildew races is developed, it will be used for genetic mapping of mildew resistant genes in 5S. The mildew resistant line will also be used for genetic identification of the telotrisomic for 5S.

Reference:
Furst, E. and T. Tsuchiya. 1982. New telosomic and acrosomic trisomics in barley. BGN 13:47-48.

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