Different quality of seeds of the new <i>Clarkia Amoena</i> raspberry bowl in the south of Western Siberia

Abstract

Clarkia amoena (Lehm.) A. Nelson & J. F. Macbr., a valuable outdoor ornamental crop, was grown south of Western Siberia (GPS coordinates: 55.0312880° N, 82.9903190° E). The work aimed to study the features of the reproductive biology of a new variety of clarkia Malinovaya chasha selected by the Novosibirsk State Agrarian University and to assess the topographic (quantity and quality of seeds from shoots of different orders), matural (various degrees of fruit ripening) and ecological (dependence of productive and sowing attributes on the main climatic factors in periods flowering and fertilisation) variability of economically valuable traits. The study used the method of multiple regression, correlation, and cluster analyses of experimental data. Fruits and seeds of a new variety of Clarkia Raspberry Cup, which were set during free pollination, formed at different flowering times and on shoots of various locations on the main stem, differed in quantity, weight, size and sowing qualities. Analysis of seed quality indicators (weight of 1000 seeds, germination energy, germination) revealed a multiple regression dependence on the heat supply of the periods of fertilisation and seed formation. The importance of the seeds of the clarkia variety Raspberry bowl by weight of 1000 pcs., formed in different periods, varied from 0.327 g in the period unfavourable for seed formation - from August 20 to September 10 - to 0.6 g in the favourable period - the first ten days of August. A significant dependence of the mass of 1000 pcs. Based on the average daily air temperature and the sum of active temperatures above 15 °C, the correlation coefficient (r) ranged from 0.976 to 0.978. The conducted studies have revealed several features of the formation of the crop structure of a new variety of Clarkia, depending on topographic, matural, and ecological variability. The actual seed productivity of the clarkia variety Raspberry bowl in the south of Western Siberia is, on average, 50% of the potential. From one varietal plant in the south of Western Siberia, 3.026 g of seeds are obtained (on average, over three years of research). The established relationships between the quality of seed material and the main climatic factors make it possible to control and, to a certain extent, predict the seed yield of the new variety Clarkia amoena Raspberry bowl in the sharply continental climatic conditions of the south of Western Siberia.