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长穗薄冰草(Thinopyrum ponticum)是禾本科小麦族薄冰草属植物,其异名为长穗偃麦草(Elytrigiaelongata)和高冰草(Agropyronelongatum )。因其所含染色体组为J(E) ,完全不同于偃麦草属SX染色体组和冰草属P(C)染色体组,所以欧美国家的学者大多支持将其另立为薄冰草属的学术观点。
Thinopyrum ponticum is a genus of grassy wheat genus Thinopyrum with the synonyms Elytrigia elongata and Agropyronelongatum. Because of its contained chromosome group J (E), completely different from the genus SX and Agropyron P (C) genome, so most scholars in Europe and the United States support its separate form of the genus Betula View.