PERFORMANCE OF INTERSPECIFIC AND INTERGENERIC HYBRIDS OF TRITICUM AESTIVUM L. FOR WHEAT IMPROVEMENT PART I. PERFORMANCE OF WINTER GENERATIONS F_43 -- F_5 OF T. AESTIVUM L, WITH TRITICUM (2x, 4x), AEGILOPS (2x) AND ELYMUS (4x) SPECIES IN RESPECT OF SO

摘要

The material for investigation consisted of F_3 -- F_5 progenies of winter type segr egants originated from the crosses of Triticum aestivum L. with some species of Triticum (2x, 4x), Aegilops (2x) and Elymus (4x) genera. Progenies of 613 individualsand 405 lines were evaluated in the field and the laboratory conditions with regard to some agronomic characters. Out of them, 235 individuals and 188 lines characterised hy many highly -- advantageous traits were selected: 39 individuals and 51 lines exhibited 9 degree spike resistance (in the scale 1 -- 9, 9 --healthy and 1 -- strongly affected) to Septoria and Fusarium pathogens; 9 individuals and 23 lines had extremely long spikes (15.0 --18.0 cm); 193 individuals and 139 lines exhibited high degreeof fertility (22 -- 26 spikelets per spike); 53 individuals and 45 lines developed 5 -- 6 kernels per spikelet; 164 selections possessed large kernels; and 69 selections presented new type of dwarfness. 385 selections joined 2 -- 5 traits reported above. These traits are not encountered at all in hexaploid wheat T. aestivum L. The selected forms can become a source material for improvement of hexaploid wheat T aestivum L. in crossing programs.