Iron is an important micronutrient element of plants. Iron-deficiency chlorosis is a common disorder for many plants grown in alkaline soil, and reports have indicated that it causes consequent yield reduction. Mains xiaojinensis is a high Fe-absorption apple genotype. In the last decade, many researches have focused on the physiological and biochemical basis of iron uptake and metabolism in Mains xiaojinensis., Little is known about genetic background of the high Fe-absorption character. The ob...