Journal Article
New donors of sunflower resistance to broomrape race G: studying of a trait inheritance [2018]
Guchetl', S.Z.; Antonova, T.S.; Araslanova, N.M.; Chelyustnikova, T.A., The V.S. Pustovoyt All-Russia Research and Development Inst. of Oil–Producing Crops, Krasnodar (Russian Federation);
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A parasitic plant broomrape Orobanche cumana Wallr. is one of the limiting factor in sunflower production. The most effective method of control is genetic resistance of breeding germplasm. A team of authors developed lines resistant to broomrape races of high virulence, including G, which were not studied for this trait inheritance. So, the purpose of this work was to study inheritance of resistance to broomrape race G in new sunflower lines-donors F1. As a material for research we used five resistant lines-donors and susceptible to the parasite lines bred by All-Russian Research Institute of Oil Crops. We estimated resistance in plots infected with broomrape race G by the Panchenko's method. While studying inheritance of the trait in the new donors of sunflower we did reciprocal crosses of these lines with susceptible sunflower forms. We obtained from seven to nine cross-combinations per each resistant line, one-two families per each hybrid. We estimated ten plants from each family. Almost all obtained hybrids had low degree of broomrape infection, it was independent on a genotype of susceptible or resistant parental line and a line used as a maternal one. In many families we observed segregation for resistant and semi-resistant plants. This data certifies incomplete dominance of the trait 'resistance to broomrape race G' in the new lines-donors. The highest indicators of the dominance degree hp showed hybrids with a line RGL 2 – from 0.92 to 1.00. The lo
west ones were in hybrids with a line RGL 1 – from 0.72 to 0.94. In all obtained hybrid combinations with all donors, we did not observed any differences in a trait dominance degree in reciprocal F1 that certifies absence of a maternal effect in these lines.
