Winter tolerance of synthetic wheat forms

Hristo Stoyanov

Abstract: Synthetic wheat forms (2n = 6x = 42, AABBDD) as a product of wide hybridization, show too much differentiation to environmental factors. To ascertain the influence of low temperatures and the natural processes of hardening, 25 synthetic wheat forms samples were tested in conditions of economic 2011 – 2012 year. The studied plants are C3 generation derived from crosses of Triticum turgidum ssp dicoccon (2n = 4x = 28, AABB) with wild species Aegilops tauschii (2n = 2x = 14, DD). In conditions of extreme low temperatures and poor hardening in the period 1. X. 2011 – 31. III. 2012, wide variation (69%) was established in refer to winter tolerance of the samples. In a comparative analysis of winter tolerance of the synthetic forms with bread wheat frost tolerance standards (Mironovska 808, Bezostaya 1, Rusalka, № 301, San Pastore) only two accessions (530-1-5-3, 530-1-5-4) are approached winter tolerance of San Pastore. Synthetic forms also differ significantly from parental components in refer to winter tolerance. Despite of these differences, some accessions exhibit satisfactory frost tolerance and could be successfully used to transfer valuable qualities into bread wheat.

Keywords: bread wheat; synthetic forms; winter tolerance

Date published: 2017-07-26