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Avena nudisativa

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автореф. дис. … канд. с.-х. наук. М., 2008. 16 с.

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(с основами статистической обработки результатов

исследований). М.: Колос, 1985. 416 с.

Geometric characteristics of grain of naked oats varieties in the northern forest-steppe

zone of the Tyumen region

Fomina M.N.,

PhD in agriculture, head researcher,

Averyasova Y.S.,

graduate student,

Agricultural Research Institute for Northern Trans-Ural Region, Tyumen', Russia

Oats is a crop of universal use. Grain of oats is an excellent raw material for milling industry. Of particular

interest in this respect are naked oats varieties. Determination of grain size and its geometric characteristics is neces-

sary in grain assessing for flour production. Estimation of naked oats varieties of different ecological and geograph-

ical origin on the basic geometric parameters (linear dimensions, shape, volume, external surface area) was conduct-

ed under conditions of the Tyumen region. Study of kernel had showed that geometric parameters were depended on

growing conditions and the varietal characteristics. The most variable parameter is width of the kernel (V = 17.8-

25.0%), the thickness was changed in less degree (V = 9.7%-16.06%), grain length was characterized by relative

stability (V = 7.4-15.70%). The limits of variation within samples were: length of kernel - 4.22-10.30 mm, width –

1.00-3.17 mm thickness - 1.00-2.88 mm. The volume of grain depending on the variety ranged from 2.08 (k-7776)

to 51.41 mm

(k-15162). The area of the outer surface changed from 9.90 (k-7776) to 138.10 mm

(k-10262),

the ratio of grain volume to external surface area ranged from 0.10 (k-15193) to 0.47 mm (k-14638), the sphericity

of the grains in naked oats varieties was within 0.25 - 0.80. A distribution of varieties on the form of kernel

was conducted in accordance with the definition of the classification of the sphericity index for each group: acicular

(Ψ = 0.32-0.53), oval (Ψ = 0.40-0.64), pyriform (Ψ = 0.49-0.55). A positive correlation of the grain volume with the

content of endosperm (r = 0.55-0.88) and a 1000 grains mass (r = 0.21-0.46). Perspective sources are selected which

form large grain with high endosperm content. These sources can be recommended for use in breeding for food

purposes.

Key words:

naked oats, linear dimensions of grains, geometric parameters, sphericity, endosperm content,

grain size, sources

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