我国境内常春藤叶婆婆纳染色体计数及其生态学意义

The chronosome number of Veronica hederaefolia L. in China and its ecological significance

常春藤叶婆婆纳 ( Veronica hederaefolia L.)是地中海周缘国家的重要农田杂草 ,近期由境外传入我国江苏、浙江地区。对该种的染色体计数表明 ,我国境内的这一新外来杂草染色体数目从 1 8、36、54、32和 2 2均有 ,分别占总计数的 2 3.91 %、1 .0 9%、2 .1 7%、69.57%和 3.2 6%。新传入我国境内的常春藤叶婆婆纳是一种具有潜在危害的农田杂草。

Ivy-leaf speedwell (Veronica hederaefolia L.), a troublesome weed in summer-harvested crop fields throughout Mediterranean countries, was transferred into China recently. Studies on ivy leaf speedwell in this paper show that its chromosome number varies from 18, 36, 54, 32 to 22, accounting for 23 91%, 1 09%, 2 17%, 69 57% and 3 26% of the total respectively. Veronica hederaefolia has potential harms to crops.