椰子繁殖率低,通常雌雄同株而异花授粉(但矮种椰子大多系自花授粉),又不能进行无性繁殖,这些因子长期以来严重阻碍着有优良遗传价值的椰子种子的大量生产。曾采用过两个选种方法:混合选择和系统选择。在一个椰子群体内进行混合选择,只限于对一些遗传力强的性状才有效,然而早熟和结 Low reproduction rates of coconuts, often monoecious and cross-pollination (but mostly short-coconut self-pollination) and inability to clonally multiply, have long severely hampered the mass production of coconut seeds of superior genetic value. Have used two methods of selection: mixed selection and system selection. Mixed selection within a coconut population is limited to some heritability traits, but precocious and knotty