Изменение урожайности образцов озимой мягкой пшеницы в условиях провокационного фона («засушник»)

Abstract

The variability of productivity of winter soft wheat samples in the conditions of provoking background (“zasushnik”) The increasing drought tolerance of agricultural plants is really essential for the southern parts of this country. High air temperature and lack of moisture in soil result in disbalanced physiologic-biochemical processes in plants which provoke productivity decrease. 20 winter soft wheat samples have become the objects of study. The average productivity of the studied samples in the conditions of provoking background (“zasushnik”) ranged from 170.5 g/m²(‘Don 107’, standard variety) to 230.0 g/m²(‘771/09’). The largest grain productivity in the conditions of artificial drought (trial) has been produced by the varieties ‘Izyuminka’(133.3 g/m²), ‘771/09’(137.5 g/m²), ‘Stanichnaya’(140.6 g/m²), ‘Lilit’(150.7 g/m²), ‘Asket’(155.1 g/m²) that was on 10.3 g/m²; 12.7 g/m²; 17.6 g/m²; 27.7 g/m²; 32.1 g/m² (НСР₀₅ =2.5 g/m²) more than productivity of the standard variety. The conducted study established that the samples ‘Don 107’, ‘629/05’, ‘Asket’, ‘Lilit’ and ‘Kapitan’ characterized with large productivity on two backgrounds of growing are of special value as initial material for wheat breeding on drought tolerance.