PJB-2018-682
RELATIONSHIPS BETWEEN SURVIVAL IN WINTER COLDS AND SOME MORPHOLOGICAL AND TECHNOLOGICAL CHARACTERISTICS IN SAFFLOWER GENOTYPES
Hasan KOÇ
Abstract
This study was conducted in the production seasons of 2013-2014 and 2015-2016 on test fields at Bahri Dagdaş International Agricultural Research Institute in the Province of Konya, Turkey, where winters are quite harsh, to determine the relationships between tolerance to winter colds in safflower and some morphological and technological characteristics. Of the 112 genotypes, 11 genotypes which had been selected in previous years on the basis of their tolerance to winter conditions and 4 varieties (Remzibey, Dinçer, Linas, Balcı), which were registered as spring plants in Turkey, were used in the study as materials. Trial sowing was performed in the first week of October in autumn. The survival rates of the genotypes in winter colds were determined at -14.2 0C in the 2013-2014 production season and at-17.3 0C in the 2015-2016 production season. Root lengths and plant habits were measured in autumn in the rosette stage (6-8 weeks after emergence). Spring sowing was conducted in the first week of April to determine the stem elongation time of the genotypes and thus their stem elongation times were specified. Oil and seed coat ratios, on the other hand, were determined before sowing for fear that they might be completely destroyed by cold. In standard varieties, survival rates varied between 1.25 % and 40.7 % at -14.2 0C without a snow cover in the 2013-2014 production season, whereas in tolerant genotypes this rate was between 94 % and 99.5 %. In the 2015-2016 production season, the survival rate in standard varieties that were sensitive to winter colds varied between 0 % and 2 % at-17.3 0C without a snow cover, whereas the survival rates in the most tolerant genotypes varied between 85.9 %, 77.6 % and 54.4 %, respectively. A significant correlation was determined between the survival rate and plant habit and oil ratio. It was found that the winter-tolerant lines had a more prostrate plant habit and lower oil ratios in the rosette stage. A positive and significant relationship was found between winter survival and root length, seed coat thickness and the length of stem elongation time. Key Words: safflower, winter survival, cold tolerance, plant habit
To Cite this article:
Download
