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一、用一般的套袋授粉法进行苹果和梨、和核果类桃、李、樱桃、山杏、山毛桃等组合的有性杂交可以获得杂交果实和种子。二、杂交的结实率因父本的种类而不同,苹果和梨(仁果类)杂交结实率、结种子率一般较苹果和桃、李、樱桃等核果类为大。三、母本苹果不同品种不同的自然及栽培条件下成功的可能性不同。因此在进行远缘杂交时应同时选几个品种作为母本,在不同年份连续进行较易获得成功。四、先授以远缘花粉隔四小时后再授以限量近缘花粉的混合授粉法所得结果不可靠。是否用延长间隔时间或采用丧失发芽力的近缘花粉的混合授粉法以促进杂交结实而不致引起差误有待于进一步研究。五、用去雄后6天进行授粉的衰老柱头授粉法,似不宜用于一般杂交结实尚不很困难的苹果和梨之间的杂交,但用于苹果和某些核果类果树之间的杂交似有促进作用。六、以父本种类作砧木对母本进行教养影响的无性渐近杂交法显著地提高了苹果和梨远缘杂交的结实率。七、远缘杂种生活力弱,幼苗甚易夭折,一般从茎的基部或地下部分开始变褐,渐渐全株枯死。杂种部分植株表现父本梨或全新性状,表现这些性状的植株生活力尤为衰弱。如何克服杂种幼苗的夭折尚待继续研究。
First, with the general method of bagging pollination of apple and pear, and stone peach, plum, cherry, apricot, mountain peach and other combinations of sexual hybrids can obtain hybrid fruit and seeds. Second, the seed setting rate of hybrids varies according to the type of male parent. The seed setting rate of hybridization between apple and pear (pomelo) is generally larger than that of apple and peach, plum and cherry. Third, the female apple different varieties of different natural and cultivated conditions, the possibility of success is different. Therefore, in the distant hybridization should be selected at the same time as a female parent several varieties, continuous success in different years of success. Four, the first grant of distant pollen every four hours after the grant of limited pollination of the mixed pollination results obtained unreliable. Whether to use extended poll time or mixed pollination method of using germplasm with relative pollen to promote hybridization and fruiting without causing errors needs further study. Five, with the male 6 days after pollination of the stigma stigma pollination, it seems not suitable for general hybridization is not yet very difficult to cross between apple and pear, but for apple and some stone fruit trees between hybrids Seems to promote the role. Sixth, asexual asymptotic hybridization with parental species as the parental rearing parent significantly increased the seed setting rate of distant hybridization between apple and pear. Seven, far-off hybrids weak viability, seedlings are very easy to die, usually from the base of the stem or underground part began to brown, and gradually whole plant died. Hybrid parts of the performance of male parent pear or new traits, the performance of these traits of plants is particularly weak viability. How to overcome the abortive hybrid seedlings remains to be studied.