Mityushkin A.V., Zhuravlev A.A., Simakov E.A., Gaizatulin A.S., Mityushkin A.V., Salyukov S.S., Semenov V.A., Ovechkin S.V.
The aim of the work is to study the nature of inheritance of tubers in hybrid potato populations from crossing specially selected parent forms, covering a wide range of variability of this morphological feature. Research material: breeding varieties that differ in tuber shape from rounded to elongated and hybrid populations from crossing according to the diallel scheme. The research was conducted in 2017-2018 at the experimental bases of VNIIKH Korenevo and Pyshlitsy in the Moscow region. As a result of studying the nature of the inheritance of tubers in 35 hybrid populations obtained from diallel crosses of parent components characterized by a significant difference in this characteristic, a wide variability in the shape of tubers was established in both breeding varieties (7.8-16.8%) and hybrid offspring (10.5-22.2%) of potatoes. In the hybrid offspring of the studied parent forms, there was a cleavage based on the shape of tubers with a predominance of elongated tubers and an increase in the variability of the trait for individual populations. The correlation between the tuber shape indices of the original parent forms and their offspring varied from weakly positive to weakly negative, indicating polygenic control of this trait. A negative correlation was established between the tuber shape of two maternal forms with elongated tubers and the tuber shape of their hybrid offspring, the level of which is -0.17 and -0.60, respectively. In hybrid populations with the participation of mother forms with elongated tubers, genotypes with oval tubers are formed under the influence of round-oval pollinators. The best pollinator, well transmitting the shape of tubers to offspring, was the variety BP 808, which had an average heritability coefficient of 0.36. The rest of the paternal forms are ranked in the following order according to the number of decrease in the heritability coefficient: Golubka (0.33), Innovator (0.24), Vimpel (0.12), Krepish (0.01). Only Nocturne (0.29) and Vineta (0.29) varieties were distinguished among the mother forms. The use of pollinator varieties in crosses that differ in an increased heritability coefficient of the tuber shape makes it possible to pass this trait to hybrid offspring with a greater probability.
Key words: morphological features, tuber shape, diallel crosses, character of trait inheritance
Mityushkin A.V., Cand. Sci. (Agr.), head of the laboratory for selection of varieties for processing
Zhuravlev A.A., Cand. Sci. (Agr.), senior research fellow
Simakov E.A. (author for correspondence), D. Sci. (Agr.), head of the experimental gene pool department. E-mail: firstname.lastname@example.org
Gaizatulin A.S., research fellow
Mityushkin A.V., Cand. Sci. (Agr.), senior research fellow
Salyukov S.S., research fellow
Semenov V.A., research fellow
Ovechkin S.V., research fellow
Lorch Potato Research Institute
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For citing: Inheritance of tubers in hybrid potato populations of different genetic origin. Mityushkin A.V., Zhuravlev A.A., Simakov E.A., Gaizatulin A.S., Mityushkin A.V., Salyukov S.S., Semenov V.A., Ovechkin S.V. Potato and vegetables. No5. Pp. 36-40. https://doi.org/10.25630/PAV.2020.34.18.007 (In Russ.).