Study of Combining Rice Quantitative and Quality Important Genes Via Marker Assisted Selection (MAS)

Different characters influence the marketing of rice in which aroma، amylose content، gelatinization temperature، gel consistency and grain shape are the most important ones. Two local quality (Shastak and Domsia) and two improved rice varieties (Nemat and Fajrr) were used to pyramid the qualitative genes into new released Ghaem variety through classical methods and marker aided selection. Ghaem variety was used as a recipient parent and crossed with others mentioned varieties. Then، composite crosses were made between F1 and after growing single plan، phenotypically desirable individual plant were selected. Followed by molecular analysis were used for study on segregation and combination of target genes using linked markers. The results indicated that Ghaem/ Domsia// Ghaem/ Shastak and Ghaem/ Nemat// Ghaem/ Fajr are the suitable crosses due to having most of the qualitative controlled genes، particularly aroma and grain shape. Mean while it is recommended that the final figures come out after doing advance generations and study the promising lines.