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Control of tissue culture response in wheat (Triticum aestivumL.)

✍ Scribed by E. K. Kaleikau; R. G. Sears; B. S. Gill

Publisher: Springer
Year: 1989
Tongue: English
Weight: 509 KB
Volume: 78
Category: Article
ISSN: 0040-5752
DOI: 10.1007/bf00266658

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✦ Synopsis

The ability of immature embryos of wheat (Triticum aestivum L.) to respond to tissue culture has been shown to involve the group 2 chromosomes. The available group 2 ditelosomic and nullisomic-tetrasomic lines of 'Chinese Spring' wheat were used to determine the chromosome arm location and chromosome dosage effect associated with the expression of tissue culture response (TCR). Significant differences were found between the aneuploid lines and the euploid control for the expression of both regenerable callus formation and callus growth rate. A model is proposed suggesting that a major TCR gene is located on 2DL and that 2AL and 2BS possess minor TCR genes. Furthermore, a major regulatory gene controlling the expression of TCR genes may be located on chromosome 2BL.

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