Skip to main content
ARS Home » Midwest Area » Columbia, Missouri » Plant Genetics Research » Research » Publications at this Location » Publication #85301
Title: HETEROCHROMATIN DIFFERENCES IN XIZANG CULTIVATED AND SEMI-WILD WHEAT REVEALED BY C-BANDING TECHNIQUES

Author
item CHEN, JIANMIN - YANGZHOU UNIVER, PRC
item REN, ZHENGLONG - SICHUAN AGRI UNIV, PRC
item GUSTAFSON, J

Submitted to: Acta Agronomica Sinica
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 1/31/1998
Publication Date: N/A
Citation: N/A

Interpretive Summary: The chromosomes of cultivated wheat and semi-wild types from China were compared to determine if there were sufficient differences among them to warrant further study using molecular techniques. Microscopic observation of differentially marked chromosomes of the Chinese material showed only minor variations from the standard chromosome banding pattern. No new species were found, and there were insufficient varietal differences to use DNA fingerprinting.

Technical Abstract: Heterochromatin differences in Chinese Spring wheat, Xizang cultivated and semi-wild wheat were investigated by using C-banding technique. Although these materials had basically similar C-banding patterns, polymorphisms for C-bands in their size, total number, and location were found among them. These banding polymorphisms were mainly expressed in the A and B genomes, and in the intercalary regions and terminal regions of the chromosome arms. Compared with the C-banding pattern of Chinese Spring, the chromosomes with C-band polymorphisms were mainly 2A, 6A and 7A of A genome; 2B, 3B, 4B, and 7B of B genome in semi-wild wheat; and 2A, 7A, and 7B in Xizang wheat. The results indicated that the three wheat types were practically one species. The Xiang wheat was unlikely to have originated from the hybridization of cultivated wheat.