بررسي تنوع ژنتيكي و جغرافيايي در برنج با استفاده از صفات فيزيولوژيكي و زراعي

Study of genetic and geographical variation in rice (Oryza saliva L.) using physiological and agronomical traits

Rice is an important nutrient crop and plays strategic role for food security worldwide. Study of genatic variation is essential for yield improvement, increasing quality and other agronomically important traits. Four hundered and nineteen rice accession of several provinces received from National Plant Gene Bank were studied. Sowing, seedling transplanting (single plant) and other husbandary measures carried out according to the cultural practices needed in Mazandaran region. Sixteen physiological and agronomically important traits recorded on the basis of standard evaluation system (SES). Cluster analysis performed according to the minimum variance, using SPSS software. The maximum and minimum variation belonged to the Gillan and Mazandaran provinces and Kohkiluieh-Boyerahmad, Sistan-Baluchestan and Chaharmahal-Bakhtiari provinces, respectively. The cluster of the whole data (total population, 419 cultivars) showed 6 distinct clusters at 35% genetic distance. This dandrogram (total population) indicated that the rice accession from Gillan and Mazandaran located at two independent clusters but most of accessions from Eilam, Khuzestan, Kohkuluih-Boyerabmad and Fars provinces were very close to the Mazandaran accessions. It is concluded that many accessions of Mazandaran have been transferred to the these provinces.