柑桔果皮色泽遗传的研究

Studies on the Rind Color Heredity of Citrus

Many years' investigation results on the heredity patterns of citrus fruit rind color of 1876 hybrid seedlings in 63 cross combinations showed that the yellow rind is a recessive character controlled by genotype rryy, and that the orange rind is controlled by the heterozygous combinations of Rryy, rrYY or rrYy. The expression of red gene R must have the existence of orange gene Y, in other words, only R-Y-genotypes are the red rind.In order to obtain the red rind hybrid the parents must have gene R and Y, or at lest one parent is the red rind variety.