Науково-технічний бюлетень Інституту олійних культур НААН

Scientific and Technical Bulletin of the Institute of Oilseed Crops NAAS (ISSN: 2078-7316) / 2015 / 22 / P. 90-97
Variation in components of oil flax seed productivity under conditions of steppe of the Ukraine
Tovstanovska T.
The article is devoted to solving important scientific task to determine the level of phenotypic variability in seed productivity traits of linseed and establish the effectiveness of breeding for those traits. The material of the research were 15 collection samples that differ in biological, morphological and economic traits. Research carried out for years 2005-2007. The weather conditions prevailing during the studies were contrasting hydrothermal main indicators. In the study of phenotypic variability was determined by the coefficient of variation V - standard deviation, expressed as a percentage of the arithmetic mean of the population. Volatility is considered to be negligible, if the coefficient of variation does not exceed 10 %, average - V greater than 10 % but less than 20 % and significant - V greater than 20 %. We used such research methods: Field - conducting phenological observations and surveys; laboratory - definition of seed plant productivity; statistics (analysis and evaluation of the reliability of the experimental data). The studies found that the number of boxes on the plant has changed to a large extent reflecting the significant impact of conditions, at the sign. Factors such as the density of the power plant and the area also affects the level of variability of the trait. In the context of 2005, the number of bolls per plant varies widely (from 8,5 to 21,1 units.). The range of variation for this was the basis of the average (17,3-18,7 %) to high (20,1-36,9 %). Basically symptoms vary to a large extent - in 12 samples out of fifteen. The average conditions of 2005 variation coefficient was significant and was 29,2 %. In the context of 2006, the number of bolls per plant varied from 11,9 to 26,5 pc. Varying character in five samples had a mean (12,8-18,6 %), from 10 - significant (23,0-41,4 %). On average, in the conditions of 2006 the coefficient of variation was high – 25,0 %. In arid 2007 the flax plant formed a small number of boxes - from 4,5 to 13,1 units. Almost all of the test samples had a significant characteristic variation (25,0-43,7 %), one - the average (14,2 %). On average, there is a high level of variability, 32,4 % in terms of this year. Due to the high variability of phenotypic trait "the number of bolls per plant", the selection should be done in a few years. Tag "number of seeds in a box" was characterized by moderate to significant variability by years of research. In 2005, this conditions measure ranged from 6,9 to 9,2 seeds. Six samples were characterized by an average level of the coefficients of variation (10,3-14,1%), seven - small (5,3-9,3 %). On average, in terms of 2005, the figure was 11,8%. In the context of 2006 the scope of the variation index was 7,4-9,6 pieces of seeds in a box. Most samples, namely 12, characterized by a low level of variability in the value of 3,3-9,3 % coefficient of variation, varied in three samples moderate (8,9-12,6 %). On average, in 2006 the figure was insignificant and amounted to 7,8 %. The conditions 2007, mainly, the samples had an average degree of variability (10,9-16,9 %), four sample varied slightly (8,3-9,6 %). Compared to 2005 and 2006 in 2007 under the average coefficient of variation was higher and amounted to 12,5 %. Since the level of variation of the trait "number of seeds in a box" is close to the little changes, the selection of plants is effective. Analysis of the results of research to determine the variability of the mass of 1000 seeds showed that some flax samples were more stable over the years, other indicators are significantly changed depending on the year of cultivation. High rates of mass 1000 seeds in most of the samples was observed in 2005, the lowest - in 2007. The extent of variation of average values of the characteristic data growing at different samples from 5,7 to 7,6, almost all tested samples varied with the value of the average degree of variation coefficients 10,4-19,9 %. Symptom mass of 1000 seeds is varied in a moderate measure of the coefficient of variation of 14,6 %. The analysis of phenotypic variability in linseed samples led to the conclusion that the average variation over the years were characterized by the cultivation of such signs as "the number of seeds in a box» (V = 10,7 %), and weight of 1000 seeds (V = 14,7 %), that delivers the efficiency of selection on these grounds. For the attribute "number of bolls per plant" established considerable variation (V = 28,9 %), which indicates the need for screening for several years.
Citation: Tovstanovska, T. (2015). Variation in components of oil flax seed productivity under conditions of steppe of the Ukraine. Scientific and Technical Bulletin of the Institute of Oilseed Crops NAAS, 22, 90-97.
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