胡桃：欧亚大陆的一种核桃树（核桃核桃属），核果大且可吃，其木材有价值。

English walnut:a Eurasian tree (Juglans regia) cultivated in southern Europe and California for its valuable wood and its large, edible nuts.

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胡桃：欧亚大陆的一种核桃树（核桃 核桃属），核果大且可吃，其木材有价值。

English walnut:a Eurasian tree (Juglans regia) cultivated in southern Europe and California for its valuable wood and its large, edible nuts.

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多倍化是植物进化和育种的重要途径，倍性育种是创制大果无核果树种质的有效手段。

Ployploidy is widely acknowledged as a major channel of evolution and breeding in plants, and ploidy breeding is an effective means to create large and seedless fruit germplasm.

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