морфогенетический индекс продуктивности

The paper presents the results of a study of the biological characteristics of productivity of various breeding and genetic forms of winter rye, presented by grades and district of the Saratov breeding. Significant varietal differences in development of individual morphological parameters of the shoot.

The objects of the study were plants of 14 varieties of durum wheat Triticum durum Desf., permitted for use at different times in the period from 1975 to 2014. An analysis of the elements of ear productivity in durum wheat plants of Saratov varieties under the conditions of 2020 was carried out. The varietal features of the development of the spike of the main shoot were revealed according to a number of characteristics: the number of spikelets in a spike, the number of grains in an ear, the weight of a grain, the number of ungrained and grained spikelets.