PRODUCTIVITY POTENTIAL, STRESS TOLERANCE AND ECOLOGIC PLASTICITY OF MIDDLE-EARLY VARIETIES OF SPRING WHEAT

• Main Author: V. A. Sapega
• Format: Article
• Language: Russian
• Published: Federal State Budgetary Scientific Institution “Agricultural Research Center “Donskoy”" 2018-06-01
• Series: Зерновое хозяйство России
• Subjects: spring wheat; varieties; productivity; stress tolerance (resistance); plasticity; general adaptability
• Online Access: https://www.zhros.online/jour/article/view/277

The purpose of the study is the assessment of middle-early varieties of spring wheat on productivity and parameters of adaptability. The material of the researches was presented by five middle-early varieties of spring wheat, which had been tested in the northern forest-steppe part of the Tumen region. The environmental indexes showed that the most favourable conditions for the growth and development of spring wheat varieties were in 2011, the worst conditions were in 2012 and 2013. On average the varieties ‘Novosibirskaya 31’, ‘Tumenskaya 30’, sown in fallow lands and the variety ‘Tumenskaya 30’, sown after wheat were the best ones with their productivity of 5,45 t/ha and 4,57 t/ha respectively. The varieties sown in fallow showed the highest realization of their potential (72.2%). All varieties had the large change of the productivity and they showed a low stress tolerance regardless of the ancestor. The variety ‘Tumenskaya 30’ (-2.94), sown in fallow and the variety ‘Iren’(-2.77), sown after wheat showed the best stress resistance. The varieties ‘Novosibirskaya 15’, ‘Novosibirskaya 29’ and ‘Novosibirskaya 31’ can be characterized as ecologically plastic. The variety ‘Iren’ (sown after wheat) has a slight response to the change of conditions (bi = 0.88), the variety ‘Tumenskaya 30’(sown after wheat) is more intensive (bi = 1.17). The varieties ‘Novosibirskaya 31’ and ‘Tumenskaya 30’ showed the highest general adaptability. According to the complex assessment on productivity and parameters of adaptability, the varieties ‘Novosibirskaya 31’ (sown after wheat) and ‘Tumenskaya 30’ (sown in fallow) are the best varieties.