S. UNAL, H. K. FIRINCIOĞLU and Z. MUTLU
Central Research Institute for the Field Crops, P.K. 226, 06042, Ulus, Ankara
UNAL, S., H. K. FIRINCIOĞLU and Z. MUTLU, 2016. Improvement of winter hardiness in common vetch lines for semi-arid conditions. Bulg. J. Agric. Sci., 22: 756–766
Common vetch (Vicia sativa L.) is a spring crop and extensively grown in semiarid areas of Turkey. Its yield potential is strictly limited by short growing season in a year. This research was designed to improve winter hardiness of common vetch allowing autumn planting and early spring growth. Thereby, prolonging growing period and eliminating adverse effect of short growing period leads high yields of herbage and seed. All lines studied were screened for winter hardiness in nursery plots at the beginning of the research. The three promising lines determined were tested with check varieties in yield trials during the 2004/05, 2005/06, and 2006/07 cropping seasons. All genotypes were visually scored for winter hardiness (1–9 scale, from resistant to susceptible) and winter hardy index of the lines were categorized into resistant to winter conditions. Winter hardiness scores of the lines were 2.7 and 2.3 in the growing seasons of 2005/06 and 2006/07. Moreover, biological yield, seed yield, straw yield, thousand seed weight and harvest index were detected. Some morphological characters were also measured such as height and thickness of main stem, natural plant height, stem numbers per main stem, pod numbers of per plant, seed numbers per pod, pod length and pod wide. Lines biological, seed and straw yields ranged from 2555.72 to 3298.35 kg/ha; from 1180.17 to 1403.81 kg/ha and from 1813.12 to 1894.55 kg/ha, respectively. Biological, seed and straw yields of lines were also higher as 53.23%, 105.07% and 44.57% than those of check varieties, respectively. The results demonstrated that three lines (L-1500, L-1544, and L-581) were promising in terms of yield potential and winter hardiness. Principle component analysis (PCA) were used for the evaluation of measurements. In conclusion, three advanced common vetch lines can meet the farmers demand with satisfactory yield level and production amount for feeding their livestock in Central Anatolian Highland conditions of Turkey.