Peredacha pshenitse Triticum aestivum L. khromosomy Aegilops sharonensis Elg,pridayushchej ej ustojchivost' k muchnistoj rose.
1993
Zhirov E.G. | Ternovskaya T.K.
It is quite difficult of transfer Aegilops sharonensis chromosomes into wheat using the standard technique, because of a gametocidal effect of the chromosome 4S1. A number of lines of common wheat variety Aurora containing 21(11) in meiosis and possessing some particular characters of Ae. sharonensis were produced from the genome-substituted from Aurosis (tetra-Aurora - Ae. sharonensis). Eight lines resistant to mildew lines were self-crossed and crossed with Aurora. The study of chromosome pairing and mildew resistance in the hybrids showed that all substituted lines had the same alien chromosome. However, some lines differed from the others in a wheat chromosome which was replaced by the alien one. To identify which of Ae. sharonensis chromosome was substituted for wheat homoeologue from the D genome, two substitution lines Aurora were crossed with the substitution lines Chinese Spring: 1E(1D), 2E(2D), 3E(3D), 4S1(4D), 5U(5D), 6R(6D), 7E(7D). The results of chromosome pairing study in the hybrids showed that in one of the lines, Ae. sharonensis chromosome substituted the wheat chromosome 6D, while in the other line substitution occurred in no D genome. This chromosome may by designated 6S(1) or 6S(sh). It is a satellite-bearing chromosome, carries a dominant gene for powdery mildew resistance, brings about the development of awns in the uppermost spikelets of the ears antocyan colour of the upper part of stems.
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