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GrainGenes Reference Report: CGC-12-851

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Reference	CGC-12-851
Title	Ethyl methanesulphonate-induced chlorophyll mutations in Triticum aestivum.
Journal	Canadian Journal of Genetics and Cytology
Year	1970
Volume	12
Pages	851-859
Author	Washington WJ Sears ER
Type	Article
Abstract	Seeds of hexaploid wheat variety Chinese Spring were treated with ethyl methanesulfonate (EMS). Two hundred and fifty-six plants were observed in the M1 generation which had white, yellow or pale green longitudinal stripes in their leaves. Of four recessive, viable, simply inherited chlorophyll mutations obtained in M2, two were chlorina (pale yellow-green), one was virescent (white or nearly white as a seedling but later turning green), and one was also virescent but in some plantings had late leaves that were 'white banded'. An albino mutation was also recovered. The two chlorina mutants were located on chromosomes 7B and 7D, the homoeologues of chromosome 7A, which was already known to carry a similar mutation, chlorina-1. The mutants were located by the use of monosomics, taking advantage of the fact that when the chromosome carrying a chlorina gene was made monosomic, segregation of the gene then depended upon the male and female transmission of the monosome, with the result that all disomic offspring, and no others, were chlorina. Monosomic analysis also indicated that the viridis (white or nearly white as a seedling but later turning green) mutation is located on chromosome 3A, which was already known to carry a homoeologue of the normal allele of the gene determining a similar mutation, Neatby's virescent, on chromosome 3B. In crosses, similar mutants complemented each other only partially or not at all, showing that the mutant genes are functionally similar, although located on different chromosomes.
External Databases	https://www.nrcresearchpress.com/doi/abs/10.1139/g70-109
Allele	v2a (Triticum) cn-A1c (Triticum) cn-D1 (Triticum)
Gene	V2 (Triticum)
Gene Class	Chlorina (Triticum)
Germplasm	Chlorina-214 Chlorina-448 Viridis 508
Gene Catalogue Number	1545
Cited in	McIntosh RA et al. (1995) Catalogue of gene symbols for wheat. Proceedings of the 8th International Wheat Genetics Symposium 1333-1500.

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