以下为句子列表：
英文: Double fertilization The fusion of one pollen nucleus with the egg to form the zygote and of the other pollen nucleus with a polar nucleus to form the triploid endosperm nucleus.
中文: 双受精：指花粉粒中的一个精子与胚珠中的卵细胞结合形成受精卵，另一个精核与极核结合形成三倍体的胚乳核。
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英文: The endosperm is usually triploid and develops from the primary endosperm nucleus, the triploid nucleus resulting from the fusion of one of the male gametes from the pollen tube with the polar nuclei in the embryo sac.
中文: 胚乳通常是三倍体，由初生胚乳核发育而来，三倍体核来源于花粉管中的雄配子与胚囊中两个极核的融合。
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英文: The pollen grain germinates on a special extension of the carpel, the stigma, and double fertilization results in a diploid zygote and triploid (usually) endosperm nucleus.
中文: 花粉粒在柱头上萌发，双受精导致双倍体的合子和三倍体的胚乳形成。
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英文: EMBRYOLOGICAL STUDIES OF MEGASPORE ABORTION OF EATING TRIPLOID BANANA
中文: 三倍体食用蕉大孢子败育的胚胎学研究
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英文: Pollen parent (Tagetes putula PHBO09) is tetraploid n=x=8; the F is triploid n= x= with hybrid vigor.
中文: 孔雀草PHBO09为四倍体n=x=8,它与万寿菊不育系杂交、其杂种为具有杂种优势的三倍体n= x= 。
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