THE STRUCTURE OF YIELD OF RICE BREEDING SAMPLES AND ITS EFFECT ON PRODUCTIVITY

• Main Authors: P. I. Kostylev, Е. V. Krasnova, A. А. Redkin, L. М. Kostylevа, A. V. Aksenova
• Format: Article
• Language: Russian
• Published: Federal State Budgetary Scientific Institution “Agricultural Research Center “Donskoy”" 2018-06-01
• Series: Зерновое хозяйство России
• Subjects: rice; sample; structure of yield; productivity
• Online Access: https://www.zhros.ru/jour/article/view/319
• ISSN: 2079-8725; 2079-8733

The article gives the results of the structural analysis of the productivity of rice breeding samples from control seed-plot during the years of 2012-2014. There have been considered such essential features as number of productive stems per unit area, number of seeds per head, mass of grain and head that determine biologic productivity. The biometric and statistical analysis of 120 rice samples has been carried out to analyze the correlation among the components of the structure with productivity. The graphics of curvilinear relation between the productivity and the elements of its structure have been made. It has been determined that the productivity starts to increase through the increase of number of seeds in a head, and achieves its maximum and then slightly reduces. The best amounts of the trait were 100-110 pc in 2012 and 120-130 pc in 2013 and 2014. The samples with low and high 1000-grain weight produced high yields. In 2012 the most productive samples were the samples with 1000-grain weight of 26-27 and 31-32 g; in 2013 with 24-26 and 33-34 g; in 2014 with 25-26 and 29-32 g. The tendency of productivity increase through larger heads has been revealed. The samples with the grain mass pre head of 3,2-3,4 g gave the maximum productivity. The best stem density varied through the years: in 2012 it was 400-450 stems per 1m2; in 2013 it was 300-340 stems per 1m2; in 2014 it was 250-300 stems per 1m2. Thus, the maximum productivity of rice is usually formed when the elements of its structure have the best values.