ارزیابی خودباروری در تعدادی از اکوتیپها و ارقام یونجه

In order to investigate the possibility of selfing, inbreeding depresion and its use in alfalfa breeding programs, 14 ecotypes and cultivars from different geographical regions of Iran and other countries in september 2008 were cultivated at Seed and Plant Improvement Institute, Iran, Karaj, and superior individuals were selected and selected plants were selfed by hand under cages. Seed from the first generation of selfing of each ecotype and cultivar were planted and superior individuals were selfed in the following year. Then for assessment of inbreeding deppresion, projenies from two years of selfing and the original plants were compared in a randomized complete block design experimnet in 2011. The results indicated that alfalfa ecotypes and cultivars had different reactions to selfing and effects of inbreeding depression included rapid decline in vigor seed production. The rate of observed inbreeding deppresion based on dry matter yield in selfed generation is confirmed that depression were occurred in all populations but in ecotypes and cultivars with narrow genetic background occured with greater frequency.