Abstract
Genetical and biometrical analyses were carried out to investigate the variation of grain sizes in three winter varieties (namely Batko, Diya and Krasnodarskaya 99) under the influence of the growth regulator, Furolan and mineral fertilizer. The 1000–grain weight trait was equally analyzed. The difference in germination energy of large seeds between extreme variants amounted 6.0% (LSD05-var. = 2.85). There were significant differences in germination energy of seeds. Extreme variants differed significantly among themselves in laboratory germinating power of seeds. The difference between them was 4.0% (LSD05-var. = 1.84). The variant treated with growth regulator, Furolan did not differ significantly from control. Mineral fertilizers in Bat’ko variety increased laboratory germinating power of seeds; its increase in comparison with control was 2.0% (LSD05-var. = 1.84). The difference between experimental variants in 1000–grain weight of small grains was 0.6 g (LSD05-fact. C = 0.13) which showed that Furolan significantly increased 1000–grain weight of most of the winter wheat varieties studied.
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