沟稃草属(Aniselytron)研究概况

Advances in the study of the genus Aniselytron Merill (Poaceae)

沟稃草属(Aniselytron Merill)是禾本科早熟禾亚科的一个小属,由于其形态和早熟禾亚科其它4个属的植物相近,自该属建立起,它的属级地位以及在早熟禾亚科的系统位置一直难以确定.详细介绍了沟稃草属的命名与分类研究历史、分类现状及存在的争议,广义形态学和分子系统学的研究近况:叶片解剖学证据支持它作为一个独立的属,而分子生物学证据支持它作为早熟禾族的成员而非燕麦族的成员,但具体的近缘类群还不清楚.另外,在补充标本鉴定的基础上探讨了沟稃草属在中国的分布情况,补充了沟稃草在江西、西藏和重庆的分布.最后在当前的研究基础上,提出了今后的研究方向.

The genus Aniselytron Merill is a small genus of the family Poaceae.Because its morphology is similar to other four genera of Pooideae,its systematic position is uncertain since it was founded.The history of nomenclature and taxonomy of the genus was briefly reviewed.Its generic status was verified by leaf anatomical features,and molecular work suggested it better placed in Poeae than in Aveneae but could not trace its relatives.Moreover,some more Aniselytron specimens were identified after we surveyed spec...