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Immunological characteristics of samples of flax in the North-East of Belarus
The article presents the results of estimation of collection samples of flax in the North-East of Belarus on infectious and provocative backgrounds. It was found that the samples differed significantly among themselves on the degree of development of Fusarium wilt.
On the basis of the conducted research we have identified 4 groups of resistance to Fusarium wilt, i.e. resistant (R < 20 %), weak-susceptible (R = 20-30 %), middle susceptible (R = 30-50 %), susceptible (R > 50 %). The defined samples are recommended for fiber flax breeding as sources of resistance to Fusarium wilt.
The collection of samples of the Asian eco-geographical groups was most subject to this disease in field experiment, the degree of development which amounted to 54.3 % of the conditional scale score of 2.0 units patterns of Western European group had 26.4 % of the disease and the highest score of the conditional scale of 4.0 %. Eastern European group occupied an intermediate position according to indicators of 43.4 % of the amount of disease and 3.0 the conditional score of the scale.
The evaluation of the samples was carried out by grouping the samples for resistance to Fusarium, the degree of development, the conditional score of the scale and identified specimens from various ecological and geographical groups.
Among different biological groups of ripeness of plant flax fiber, in conditions of artificial infectious and provocative backgrounds, relative resistance had a collection samples such as: Nameless, Honkei 35, Tamari, Sunrise, Drakkar, Marylin, Biei Shinshu, Suzanne, AP 4 with the degree of development of Fusarium wilt of 20-30 %. The degree of development of disease in the samples ranged from of 9.46 % to 84.1 %. Genotypes resistant group will be used in further breeding work as sources of resistance to this disease.
Key words: flax, breeding, sample collection, resistance, Fusarium wilt, development.
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