Variability of spike productivity in F2 hybrids obtained by crossing common wheat varieties Novosibirskaya 67, Saratovskaya 29, and Puza-4 with the Skle 123-09 multifloret line

Abstract

Parameters of spike productivity indices were evaluated in plants of F 2 populations obtained by crossing the Novosibirskaya 67, Saratovskaya 29, and Puza 4 varieties with the Skle 123 09 line, character ized by "multifloret". It is shown that the line Skle 123 09 differed significantly from the studied cultivars in spike density, but no significant differences were found in spike length or the number of spikelets. Two way analysis of variance in F 2 hybrids showed that the variability of the spike length was contributed mainly by the genotypic environment and the interaction of the factors "genotype × environment". The variability of the number of spikelet in spike was determined mainly by environmental conditions. This was particularly true for cultivars Saratovskaya 29 and Puza 4, which were created for the cultivation in arid regions. The variability of the resulting character "spike density" was affected by environmental conditions, genotype, and the "gen otype × environment" interaction. Examination of the F 2 populations revealed plants with fan shaped spike lets; high grain content, as in Skle 123 09; and the best performance of other spike characters. The selected plants will be used to fix the multifloret character in the parental varieties.

Inheritance of signs of «many-flowered» common wheat and evaluation of productivity of the spike of F2 hybrids

“…Данные по признакам «длина колоса» (ДК), «плотность колоса» (D), ЧКК и их анализ были опубликованы ранее (Арбузова и др., 2014; Arbuzova et al, 2015). Однако в этой статье приводятся результаты двухфакторного анализа всех показателей, в том числе ДК, ЧКК и D у сортов, линии Skle 12309 и гибридных популяций F 2 (С29, Н67, P4 × Skle 12309).…”