The genetics of resistance against powdery mildew in flax was analyzed.The F1 plants from reciprocal cross of resistant materials 9801-1 and three susceptible cultivars ILONA,VENUS and DIANE were resistant to powdery mildew.The ratio of resistant and susceptible plants in F2 generation fitted the excepted 3 to 1.It was postulated that 9801-1 carried a single dominant and resistant gene.
F2 populations were obtained from the cross between 9801-1 and DIANE.Bulked segregate and RAPD analyses were employed to identify molecules linked to the resistance to powdery mildew.OPP02 amplified about 792 bp polymorphic band in all individuals from 9801-1 and resistant bulk,but absent in all individuals from DIANE and susceptible bulk.By further analysis in F2 segregating population,the polymorphic band was found to be cosegregated with the resistant gene possibly.The fragment was sequenced,and settled a foundation for transforming it into SCAR marker.
