小麦是世界上最重要的粮食作物之一,在我国粮食安全中发挥着重要作用。如何提高小麦产量是小麦研究与育种中长期以来的热点与难点问题。小麦穗分枝等穗型性状是单株产量的重要决定因素,也是小麦选育的关键农艺性状之一。然而,小麦是异源六倍体,基因组庞大复杂,约是水稻的34倍、大豆的 Wheat is one of the most important food crops in the world and plays an important role in food security in our country. How to improve wheat yield is a hot and difficult issue in wheat research and breeding. Spike traits such as wheat spike branching are important determinants of yield per plant and are also one of the key agronomic traits in wheat breeding. However, wheat is allosextile, its genome is huge and complex, about 34 times that of rice,