Selection of lines in segregating populations of durum wheat for effective agronomical traits in grain yield in dryland conditions
2006
Ghadirian , Hasan | Ezzat Ahmady, Masoud | Dehghan, Mohammad Ali | Ghyadi, Rahmatollah | Nazari, Abdolrahim
Most sources report from durum wheat as a resistant to drought wheat. Durum wheat hasn ,t been important in Iran, despite water deficit and drought long periods in large sections of lands under wheat cultivation and confirmed requirement maccarony production industries to durum wheat semolina. Traits segregating are started from F2 generation in segregating of population and continue until generaton several. In these stages, various combinations are appeared between fatherhood and motherhood traits, and with studyind and controling plants and populations in different growth stages, the plants are selected that have desirable agronomical characteristics, tolerant or resistant to drought and diseases and other incompatibility of planted environment and full of productivity. This study contains 31 entries of F4 generation( selected from international F3 generation), 43 entries of F5 generation( selected from F4 generation), and 36 entries of F6 generation( selected from F5 generation). The samples were planted in 6 rows of 6.65 meters with cereal planter and after cutting 52.5 cm from first and end of plot remained 6 Square meter. Selectin methode was pedigree in this stage, scince plants are near to genetical purity, therefore from per mass is selected 1-3 plants and maximum 5 plants, separatly is harvested and threshed. The selected seeds of plants are counted after controling. According to research results, from 31 entries F4 generation were selected 12 entries(25 plants), from 43 entries F5 generation were selected 15 entries(30 plants), and from 36 entries F6 generation were selected 10 entries(20 plants), for studying in later generations untill receiving to genetical purity. Also 6 lines of F6 generation that had recived to genetical purity, were selected for more study in perliminary yield comparison trial in next year.
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