The inheritance of several morphological and biochemical traits was studied in diploid (2n = 2x = 14) naked wheat Triticum sinskajae. The electrophoretic pattern of storage proteins (gliadins) of T. sinskajae differed only in two components from the pattern of T. monococcum accession K-20970, in a population of which T. sinskajae had been discovered. Analysis of biochemical polymorphisms revealed a difference between T. monococcum K-20970 and T. sinskajae in a slow 6-phosphogluconate dehydrogenase zone but not in the other eight enzyme systems examined. Nucleotide sequence analysis of the nuclear Acc-1 (acetyl-CoA carboxylase) gene revealed a 46-bp deletion from intron 11 in T. monococcum K-20970 but not in T. sinskajae. This difference was not regarded as species-specific in view of the intraspecific polymorphism of the Acc-1 locus in T. monococcum. A monogenic control was demonstrated for the spring growth habit of T. sinskajae, and the monogenic control of the specific T. sinskajae ear shape was verified. The T. sinskajae ear shape is controlled by a recessive gene, while the T. monococcum ear shape is controlled by a dominant gene. The T. sinskajae ear shape, nakedness, soft glume, aristate glume, and the oblique brachium of the outer glume proved to be linked. The set of T. sinskajae diagnostic characters is determined by a single (possibly, regulatory) gene or a set of closely linked genes. The two other genes specific to T. sinskajae—awnS, determining the awnlessness, and fig, determining the nonfissile inner (flower) glume—are, respectively, 1.35 ± 0.98 and 3.34 ± 1.54% of crossing over away from the mon gene, which determines the T. sinskajae ear shape.
Russian Journal of Genetics – Springer Journals
Published: Nov 15, 2007
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