多倍性（polyploidy）是H．Winkler最早提出的术语。是近缘种、品种间所出现的染色体数目的增减现象，基本染色体数目完整无缺的称整倍性，反之，基本染色体数目有欠缺不全的称异倍性。
n. polyploidy
这是否包括异源多倍性还是同源多倍性将都不考虑。
Whether this involves allopolyploidy or autopolyploidy will not be considered.
由于大多数牧草的多倍性和高度异质特点，牧草遗传连锁图谱的构建相对复杂。
By polyploid nature and high levels of heterozygosity of vast majority pasture plants, it was rather complicated to construct linkage maps of them.
组织培养中出现的多倍性细胞团和单倍性细胞，不会引起原二倍体物种的遗传性变异和性状变化。
The polyploidy cell masses and the haploidy cells appeared in the tissue cultures will not result in the hereditary variability and the changes of the character in the original diploid species.
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