مرکز منطقه ای اطلاع رساني علوم و فناوري - A Study on Germination Biology, Phenology and Genetic Diversity of Resistant and Sensitive Wild Oats (Avena sterilis L.) to ACCase Inhibitor Herbicides

Abstract :

In this study the germination biology, phenology and genetic diversity of four resistant and eight sensitive biotypes of A. sterilis belong to four locations (Marmara, Akdeniz, North Cyprus, iran) was compared. The results indicated that the different temperatures have significant effect on the germination rate of the A. sterilis seeds. The resistant populations consistently displayed higher germination rate than the sensitive populations at all temperature. There were statistically significant differences among populations in terms of phonological stages. When the sensitive and resistance populations belonging to same locations compared, the flowering and seed maturity stages of the sensitive populations of iranian and Marmara populations occurred earlier than their resistance populations. Also the dry weight of above-ground organs of sensitive populations was higher in iranian and Marmara populations. The genetic diversity among the twelve populations were determinated with RAPD- PCR and a dendogram was created. A total of 21 fragment were amplified, among which 17 (80.9 %) products were found to be polymorphic. The result of cluster analysis showed that the 12 biotypes classified into 2 groups which could be divided into 4 subgroups further. The genetic variation between different populations were generally larger than those within every population.