Studies on the molecular mechanism of the difference of storage capability between apple cv. Fuji and its sport Hirosaki Fuji.

苹果（Malus×domestica）品种“富士”具有卓越的储存能力，而其早期收获品种“富士”“广崎富士”则没有表现出这种能力。了解“富士”与“广崎富士”贮藏性能差异的机理，将是揭示“富士”超长保质期机理的重要线索。这一成果可能为苹果育种提供一种选择长保质期的分子标记。“广崎富士”是1984年在广崎市的一个农场发现的一种早期运动品种，它比传统的“富士”早熟整整6周。有趣的是，“广崎富士”水果的硬度比“富士”水果的硬度下降得更快。了解“Fuji”和“hiroaki Fuji”之间的差异是有趣而有意义的。因此，我调查了“富士”和“广崎富士”以外的其他运动品种之间的区别。通过成熟相关基因的表达分析发现，包括MdERF2在内的几乎所有成熟相关基因在‘富士’与其运动品种之间的表达都存在差异。

Apple (Malus×domestica) cultivar 'Fuji' has a distinguished storage capability, whereas its early harvest sport of 'Fuji', 'Hirosaki Fuji', dose not show such competence. Understanding the mechanism of the difference of storage capability between 'Fuji' and 'Hirosaki Fuji' will be very important clue to unravel the mechanism of long shelf life of 'Fuji'. Its achievement may lead to obtain a molecular marker of the selection for long shelf life in apple breeding program.'Hirosaki Fuji' is an early sport discovered at a farm at Hirosaki city in 1984 and it matures a full six weeks ahead of conventional 'Fuji'. Interestingly, the firmness of 'Hirosaki Fuji' fruit lost more rapidly than that of 'Fuji'. To know what caused the difference between 'Fuji' and 'Hirosaki Fuji' is interesting and meaningful. So I investigated the difference between 'Fuji' and its other sport cultivars in addition to 'Hirosaki Fuji'. Through the analysis of the expression of ripening related genes, it was revealed that almost all of ripening related genes including MdERF2 were expressed differently between 'Fuji' and its sport cultivars.