CORRELATION OF THE QUANTITATIVE TRAITS OF SPRING SOFT WHEAT IN THE CONDITIONS OF PRIMORSKY KRAI
Development of spring wheat varieties with high and stable productivity is an important direction in breeding. The great interest for breeding is the study of the samples of productivity elements (a number of seeds in the ear, grain size, productive tillering, etc.), which finally is a result in productivity. Spring wheat productivity as is known, is determined by two main indicators: the number of productive ears per unit area and grain weight per one ear. Establishing correlation between productivity and its components showed that the yield of spring wheat is largely dependent on the number of productive ears. Taking into account that productivity of spring wheat varieties is the result of a complex interaction of many of its constituent components, defined as plant genotype, and the conditions of its cultivation, it is necessary to have sources with the most prominent elements of productivity for practical breeding. To increase productivity of the ear may be due to three components: the number of ears, a number of seeds in the single ear and 1000 seeds' weight. It was found that the single ear productivity is closely related to the number of seed per ear. In our experiments, when analyzing varieties average correlation coefficient was 0.81 and in th individual samples it is close to 1,0. The less close dependence of the plants' productivity with productive tillering, ear length and number of spikelets per ear (average r = 0.23) was observed in varieties: Gornouralskaya and Vavenkov's Memory. Length spike, number of grains per spike and productivity of the main spike make the greatest contribution to the productivity of plants varieties.