TY - JOUR T1 - Study of Ehd1 gene role in controlling flowering time in an advanced backcross population of rice at two climatic conditions TT - نقش ژن Ehd1 در کنترل زمان خوشه‌دهی در یک جمعیت تلاقی برگشتی پیشرفته برنج در دو شرایط آب و هوایی JF - MGJ JO - MGJ VL - 11 IS - 2 UR - http://mg.genetics.ir/article-1-1415-en.html Y1 - 2016 SP - 165 EP - 172 KW - Ehd1 KW - Genotype-location interaction KW - Heading KW - Relationship KW - Rice N2 - Heading date is a key trait for geographical and seasonal adaptation of plants. It is a complex trait which is controlled by multiple genetic factors. In this research, the relationship of Ehd1 gene with heading date was assessed at two climatic conditions (Gorgan and Zanjan) in an advanced backcross population of rice derived from crossing two Iranian cultivars Neda and Sadri. For this purpose, 97 BC1F5 lines along with their parents were evaluated phenotypically at both locations and were genotyped using genetic primers specifically designed for the functional SNP of Ehd1. Phenotypic evaluations showed that in Zanjan with lower temperatures comparing to Gorgan, heading time delayed considerably. Molecular analysis of variance showed significant effect of functional SNP only in Gorgan. Association analysis showed that Ehd1 gene is related to 10.7% and 3.05% of phenotypic variations of heading date at two locations, respectively. Regarding to the decreasing effect of Ehd1I allele on rice heading date (-2.2 dayes), employing this allele in combination with the alleles of other genes with decreasing effect on heading date is applicable in marker-assisted selection (MAS) for improving early maturity in rice. M3 ER -