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GrainGenes Reference Report: GEN-98-389

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Reference	GEN-98-389
Title	Selection and identification of a spontaneous alien chromosome translocation in wheat.
Journal	Genetics
Year	1981
Volume	98
Pages	389-398
Author	Jan CC Dvorak J Qualset CO Soliman KM
Type	Article
Abstract	A wheat (Triticum aestivum L. emend Thell) disomic addition line (2n=6z=44), SH1-152-2, with a pair of Elytrigia pontica (Podp.) Holub 2n=102=70 [syn. Agropyron elongatum (Host) P.B.] chromosomes controlling blue aleurone color was crossed with a short-statured spring wheat 'Sonora 64' (T. aestivum). Isoline pairs of blue-disomic addition lines and nonblue euploid lines were produced by selecting plants segregating for blue aleurone for 12 generations. Nineteen of 20 blue aleurone lines were 2n=44 addition lines, and one had 2n=42 chromosomes. Several lines of evidence showed that this line had a spontaneous translocation in which the B arm of wheat chromosome 4A was replaced by an Elytrigia chromosome arm carrying the blue aleurone gene. The Elytrigia chromosome in SHI-152-2 appeared to be homologous with E. pontica chromosome 4el1, which also carries the blue aleurone gene. It was concluded that the spontaneous translocation originated from simultaneous misdivision of univalents and subsequent reunion at the centromere of chromosome arm 4Aa with the Elytrigia chromosome arm.
Gene	Ba (Triticum) Ba1 (Triticum)
Gene Class	Blue aleurone
Germplasm	UC66049B
Gene Catalogue Number	594
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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