SELECTION BY NUMBER OF VEGETATIVE NODES IN HYBRID POPULATIONS OF VEGETABLE PEAS AND METHOD OF CONTROL OF ITS EFFICIENCY

Keywords: source material, generation, variability, homogeneity, reseeding, selection differential, source of trait

Abstract

Purpose. Using the original method to investigate the effect of selection on the variability of the trait number of vegetative nodes on the plant in hybrid populations of vegetable peas. Create early-maturing sources of traits. Methods: field - experimentation, hybridization, phenological observations, morphological description; laboratory - biometric measurements, structural analysis; variational-statistical – patterns of variability and reliability of results. Results. The research technique is developed. Selected varieties for hybridization. Populations of F2 and F3 were obtained by reseeding hybrid seeds in which plants with the smallest number of vegetative nodes were selected, and therefore earlier ripe. Re-selection was performed in populations F3 and F4. After propagation of these selections in the breeding nursery F4, F5, the result was checked in populations F5 and F6. Phenological observations and biometric measurements were performed in the experiments by stages of study. The latter are processed by the method of variation statistics with determination of arithmetic mean, standard deviation and coefficient of variation. The parameters of populations and selections by years of research were compared with each other, with the average parent and with the best of them. This comparison eliminates the influence of environmental factors in different years. Conclusions. Without the use of complex hybridological analysis, the efficiency of selection in populations of hybrid generations F2, F3, and F3, F4 is proved. According to the results of selection, the number of vegetative nodes in populations F5 (8.0 ± 0.4 pcs) and F6 (8.6 ± 0.2 pcs) decreased to the level of early-maturing parent variety Alpha (8.4 ± 0.1 pcs). Trait variability (V%) in populations before selection (F2 - 22.2%, F3 - 21.3%) decreased to 8.0% in F5, and to 9.3% in F6., Was within insignificant ( up to 10%), as in the homogeneous early-maturing parent variety (8.6%). An important result was the creation of two new early sources of the trait, which were used in breeding programs.

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Published
2021-01-14
How to Cite
Strygun, V., & Chaban, A. (2021). SELECTION BY NUMBER OF VEGETATIVE NODES IN HYBRID POPULATIONS OF VEGETABLE PEAS AND METHOD OF CONTROL OF ITS EFFICIENCY. Vegetable and Melon Growing, (68), 45-51. https://doi.org/10.32717/0131-0062-2020-68-45-51