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Degree of phenotypic dominance and heritability on the plant height character in wheat hybrids with different Rht-gene alleles

Motsnyy I.I., Goncharova A.I., Chebotar G.O., Chebotar S.V.

 




SUMMARY. The degree of dominance and the coefficient of heritability have been investigated as indicators of the allelic interaction at loci Rht8 and Rht-B1, which is characterized by the partial, complete or over dominance of greater plant height and by the low or medium heritability. Alleles with a weaker or without direct negative effect dominate under alleles reducing the plant height stronger. The impact of weather conditions on a change of the dominance is discussed. The line Kooperatorka has an additional allele (alleles), causing the greater heights of plants, with partially recessive mode of inheritance. An unidentified half-dominant dwarfing gene (genes) is present in a genotype of the line Odeska 3. The presence of a heterosis, caused by heterozygosity for genes, which are not critical in our research, distorts the evaluation of the allelic relationship characteristics studied.

Key words: bread wheat, dwarfing genes, plant height, the degree of dominance, heritability coefficient

Tsitologiya i Genetika 2017, vol. 51, no. 1, pp. 25-33

E-mail: motsnyyii gmail.com

Motsnyy I.I., Goncharova A.I., Chebotar G.O., Chebotar S.V. Degree of phenotypic dominance and heritability on the plant height character in wheat hybrids with different Rht-gene alleles, Tsitol Genet., 2017, vol. 51, no. 1, pp. 25-33.

In "Cytology and Genetics":
I. I. Motsnyy, A. I. Goncharova, G. O. Chebotar, S. V. Chebotar Degree of phenotypic dominance and heritability of the plant height in wheat hybrids with different alleles of Rht genes, Cytol Genet., 2017, vol. 51, no. 1, pp. 18–25
DOI: 10.3103/S0095452717010108


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