Practical breeding of red-fleshed apple: cultivar combination for efficient red-fleshed progeny production.

摘要

Flesh colour and S-genotypes of progenies of red-fleshed apple cultivar JPP35, which was produced by Jonathan x Pink Pearl, were investigated and it was clarified that 100 and 96% of progenies from Shinano Sweet (S₁S₇) x JPP35 (S₃S₇) and Orin (S₂S₇) x JPP35 (S₃S₇) containing the S₃-RNase allele, respectively, showed the red flesh trait. Using this tight linkage between red flesh trait and self- and cross-compatibility relating allele such as S₃-RNase allele, suitable cultivar combinations for efficient production of various red-fleshed apples were shown. An unknown S-RNase allele in Pink Pearl was also identified as S₁₁ and its partial genomic sequence, including a complete intron with its known S₃-RNase allele, was determined.