小麦族近325个种中大约有250个种是多年生的,其中很多是世界上重要的牧草.虽然多年生种占小麦族的75%以上,却远不如一年生种受细胞遗传学家和育种家的重视,这些一年生种包括三种主要禾谷类作物:小麦、大麦和黑麦.另外,作为牧草,凭其所处的重要地位,多年生种形成了广泛的基因库,有可能用来改良一年生禾谷类植物. About 250 species of the Triticum, a group of about 325 species, are perennial, many of which are important herds in the world. Although perennials account for more than 75% of the Triticeae, they are far less likely to be planted by cytogenetics and breeders It is important to note that these annual species include three major cereal crops: wheat, barley and rye. In addition, as herbage, perennial species form an extensive gene pool based on its importance and may be used to improve annual cereal plant.