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五、果实成熟期有人认为,梨的种在进化过程中形成了果实秋熟的特性,这种特性是显性的,为大多数品种所固有。全苏作物栽培研究所迈科普试验站,在其搜集的世界梨的品种中,秋熟品种占63％。夏熟品种也占很大数量,冬熟品种数量最少。果实冬季成熟是隐性性状,而且并非在任何时候都能由亲本充分遗传给杂种后代。例如,列宁格勒果蔬试验站甚至在有冬熟品种米丘林·布瑞·冬季梨和帕斯-克拉桑梨
Fifth, the fruit maturity Some people think that the pear species in the evolutionary process of the formation of the characteristics of autumn fruit, this feature is dominant, inherent to most varieties. All-Su Institute of Crop Cultivation Mai Kepu pilot station, in its collection of world pear varieties, autumn varieties accounted for 63%. Summer varieties also account for a large number of winter millet varieties with the least number. Fruit ripening in winter is a recessive trait and it is not always possible for the fruit to be fully inherited from the parent to the offspring of hybrids at any time. For example, the Leningrad fruit and vegetable test station even in the winter varieties of Michurin Bree winter pear and Pas Kra San pear