Abstract
The studies of plants’ assimilation activity of theTriticum carthlicumNevski. (=Triticum persicumVav.) tetraploid species’ variety samples have been carried out in the subtaiga zone (Aromashevo) and the northern forest-steppe zone (Tyumen). The number of leaves on plants by zones varied from three to five. Measurements showed that the lamina length varied from 6.4-23.7% in the northern forest-steppe zone and from 0 to 21.9% in Aromashevo. The lamina area on the main shoot of the Triticum carthlicum Nevski variety samples in the northern forest-steppe zone amounted to 62.3 cm2, which was 26 cm2less than in the subtaiga zone. Calculation of net photosynthetic productivity in northern forest-steppe zone showed that Triticum carthlicum Nevski variety samples formed from 10.864g*m2/day to 20.764 g*m2/day, giving way to durum and soft wheat. In the subtaiga zone, PPnof Triticum carthlicum Nevski wheat varied from 9.088 to 13.827 g*m2/day, significantly yielding Bezenchukskaya 139 variety.
Highlights
Over a long period of cultivated plants' selection, their assimilation activity has evolved in a certain way and an increase in the yield of varieties is associated with a change in different elements of photosynthetic productivity depending on the agroecological selection backgrounds, the crops characteristics and directions of selection
No significant differences in photosynthetic potential were found between the Triticum carthlicum Nevski variety samples
The leaf area of the Triticum carthlicum Nevski variety samples was almost twice as large as in the northern forest-steppe zone, no significant differences between cultivars were found
Summary
Over a long period of cultivated plants' selection, their assimilation activity has evolved in a certain way and an increase in the yield of varieties is associated with a change in different elements of photosynthetic productivity depending on the agroecological selection backgrounds, the crops characteristics and directions of selection. It turned out that the upper leaves increased much stronger than the lower ones during the selection process. As a result of these measurements, the economic suitability coefficient (Kec) of the best varieties increased to 45-46% versus 38-40% for Poltavka and old varieties
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