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.
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。
Chromosome doubling for somatic cells and somatic hybridization via cell fusion are effective methods to create polyploidy.
细胞融合和体细胞染色体加倍是获得杨树多倍体种质的有效途径之一。
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