Анотация: Cultivars, candidate cultivars and lines were examined. They originated from different countries or they were products of the newest selection of winter wheat (Triticum aestivum L.) in the Institute of Plants Genetic Resources, Sadovo. The present work presents results on some morphological and physiological indices-flag leaf location, continuation of vegetation period, and water exchange indices including water retention ability of excised flag leaves of the examined genotypes grown in field conditions. In the new wheat cultivars the yield potential and physiological characteristics connected with the adaptation mechanisms for drought resistance should be integrated to the highest degree. A germplasm of different origins is the basis for success of a breeding program in IPGR-Sadovo in order to create new cultivars wheat suitable for drought climatic conditions. Our results showed that cv. 90/Zhong 150 participated in the candidate cv. Nova Zvezda as the parental form. Cv. Flamura participated as the parental form in candidate cv. Vihar. Candidate cv. Strelec was established with participated of cultivar Super Flatua

Забележки: Proceedings of the XI National Conference on Plant Physiology, 18-19 november 2009, Sofia, Bulgaria