DNA analysis for choromosome size changing in plant

被子植物的基因组显示出异常广泛的范围，大小接近2,000倍。在贝母属物种（百合科）中发现了最大的DNA量，基因组中约有130 pg（130，000 Mbp），拥有10至20 µm的巨大染色体。相比之下，最近在Genlisea（Lentibulariaceae）的两种食肉植物物种中发现了最小的基因组，仅为0.06 pg（63 Mbp）。基因组分布广泛的植物类群仅限于菊科、豆科、百合科、兰科和禾本科等大科。而茅膏菜属食肉植物类群，即茅膏菜科及其密切相关的茅膏菜科，显示出出乎意料的高基因组大小变异，具有微小到巨大的染色体。在分析了紫菀属（菊科）和茅膏菜属（茅膏菜科）基因组组成中的大（L型）和小（S型）染色体组后，获得了新的见解。

Angiosperms show unusually wide range of genomes size with nearly 2,000-fold. The largest DNA amount measured is found in Fritillaria species (Liliaceae) with about 130 pg (130,000 Mbp) in the genome, possessing gigantic chromosomes with 10 to 20 µm. In contrast, the smallest genome is recently found in two carnivorous plant species of Genlisea (Lentibulariaceae) with just 0.06 pg (63 Mbp). The plant groups with wide genome ranges are restricted to some large families such as Asteraceae, Fabaceae, Liliaceae, Orchidaceae and Poaceae. Whereas sundew carnivorous plant group, the Droseraceae and its closely related family Drosophyllaceae, show unexpectedly high genome size variation with tiny to giant chromosomes. New insight was obtained after analyzing large (L-type) and small (S-type) chromosome sets in the genome composition in Aster (Asteraceae) and Drosera (Droseraceae).