Assessment of adaptive attributes of varieties and numbers of hop plant

Abstract

The purpose. To assess parameters of productivity, autoadaptivity of new genotypes and the registered varieties (standards) of hop plant of different selection parentage and selection on its basis of the most valuable ones for selection and production of genotypes. Methods. Field — for determination of attributes of plants of varieties and numbers by procedures of selection probes with hop plant of IAP and by procedures of UPOV; mathematical-statistical — for detection of parameters of ecological pliability and stability, reliability of experiences; system analysis and generalization. Results. They used method based on test of genotypes in long-term probe at different ecological conditions (year) on indexes of regression coefficient (ecological pliability), on variation of stability of an attribute (aberration from a regression line) and on generalized ball assessment of practical significance. Average productivity in experiment made 1,88 t/hectare, and top productivity demonstrated selection numbers 7031 (2,29 t/hectare), 6007 (2,23 t/hectare), A-265 (2,10 t/hectare). Productivity at the level of 2,0 t/hectare was registered for numbers 7042, 5970a and 7007. That very genotypes had positive indexes of genotypic effect of development of an attribute. Numbers with greater regression coefficient (bi>1,0) were determined: A-265, 6007, 7009, 7042, and 7043. Slavianka and 7007 were characterized by average level of ecological pliability (bi≈1). Alto, Promin, Gaidamatskyi, 5970a, 6034, 7031 poorly react to change of conditions of growing and have smaller ecological pliability (bi<1,0). As to stability of productivity (standard deviation from regression Si2 is close to null) were fixed the following varieties: Alto, Slavianka, Promin, Gaidamatskyi, and numbers: 5970a, 6034, 7031 which had average and low ecological pliability. Variation of stability of probed attribute (Si2 0,12-0,94) is more significant for numbers A-265, 6007, 7009, 7042, 7043 with high level of ecological pliability. Conclusions. Genotypes 6007, A-265, 7042 are the best ones for growing in zone of Polissia according to generalized assessment of practical significance.