Epigenetic variation plays an important role in plant growth and development, including DNA methylation, histone modification, chromosome remodeling, and RNA interference and so on.
表观遗传变异对于植物的生长发育起着重要作用，主要包括DNA甲基化、组蛋白修饰、染色体重塑和RNA干涉等。
But it's hard to tell in most natural populations whether inheritance is due to DNA sequence variation or epigenetic changes.
但在自然界大多数种群中，很难判断遗传是否源于DNA序列改变或者表观基因变异。
Many researchers say these so-called epigenetic changes are as important as genomic variation to controlling cell function and, ultimately, an individual's health.
许多研究者认为这种所谓的次生变化在控制细胞功能及最终控制个体健康方面与基因组的变化同样重要。
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