Buğday-arpa iki yönlü melezlerinde melez tohum bağlama
Abstract
This study was conducted at the experimental fields and la boratories of the Department of Field Crops, Faculty of Agriculture, U- niversity of Ankara in the academic year of 1991-1992 to determine the effects on seed set of wheat-barley varieties or lines which were recip rocally user as cross parents.VI Tetraploid and hexaploid wheat (T. durum Desf. and T. aes- tivum L.) and diploid barley (H. vulgare cv. distichon and-ff. vulgare cv. hexastichon) varieties or lines used as the research material, were re ciprocally crossed under the field conditions as eight combinations, and seed set thus obtained were cytologically and statistically evaluated. As a result of research, it was determined that, in cross- breedings between diploid barley and tetraploid wheat, percentage of seed set by using diploid barley as the female parent (4.74 %) was sig nificantly higher than that obtained by using tetraploid wheat as the female parent (0.64 % ), and the difference was statistically significant (P<0.01) On the other hand, it was determined that, in crosses between diploid barley and hexaploid wheat, the percentage of seed set obtained by using diploid barley as the female parent (4.27 %), was significantly higher than that obtained by using hexaploid weat as the female parent (0.39 %), difference was statistically significant (P<0.01). In reciprocal crosses between barley and wheat, it was determined that the seed set obtained by using barley as the female parent (4.51 %), was higher than that obtained by using weat species as the female parent (0.53 %), and the difference was statistically significant (P<0.01). In wiev of these findings; the following conclusions have been arrived at; in crosses between diploid barley and tetraploid wheat, and diploid barley and hexaploid wheat varieties or lines, seed setting per centage can be considerably increased by using diploid barley as the fe male parent used was found. KEY WORDS: Wheat-barley hybrids, diploid barley, tetraploid wheat, hexaploid wheat, intergeneric hybridization, reciprocal hybridization, seed set in crosses.