Occurrence and excessive propagation of genetic deviations in the propagation stands of winter wheat
1991
Kucera, V. | Sasek, A. (Vyzkumny Ustav Rostlinne Vyroby, Prague-Ruzyne (CSFR))
In three-year reseeding of five winter wheat varieties - Hana, Roxana, Selekta, Vala and Kosutka, from pre-grade S1 to the E grade with no selection provided, the individual varieties exhibited various propagation intensity in plants being of different type in the successive reseeding generations. A number of morphological deviations, found in the first year of reseeding, increased in the third year by 5 to 60 times. The change of gliadine spectrum was recorded by electrophoretic analysis of gliadines in most deviations, compared with a standard variety. This indicates their genetic origin due to cross pollination in the previous generations or residual heterozygosity of a variety or spontaneous mutations. The occurrence and propagation intensity of genetic admixtures evidently depends on the genetic homogeneity of the variety obtained during maintenance breeding.
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