甘肃砂田小麦育种研究

Wheat Breeding for Gravel ulched Land in Gansu Province

砂田是用砂砾覆盖农田的一种抗旱免耕农业生产方式，主要分布在年降水量１８０～３００ｍｍ的甘肃中部干旱地区，约８万ｈｍ２左右。砂田以生产春小麦为主，其新品种的选育，主要以抗早基因累加杂交方式增强抗旱性，对分离材料以特定的抗旱遗传标志进行选择。稳定材料超越常规试检程序，用移动区组法在基因和环境的互作中选优汰劣，选育成功比农家良种抗旱性强的新品种。

Grave1 mulched land is to use gravels to mulch farmland for droughtresistant notill farming production,which mainly distributs in the arid area with rainfallof 180 ～ 300mm in the middle part of Gansu province ,accounting for about 1. 2 millinmu. Spring wheat is the chief production in the gravel mulched farmland,whosewheat varieties should be characterized with good adaptability of drought resistant eco-type. The selection of new varieties is mainly to use the parent materials with drought-resistant genes in combination with accumulative hybrid zation patterns to improve thedrought resistance. The isolated breeding materals are selected with specific geneticmarkers. The stable materials superexceed the conventional experimental procedures.The shifting series plot experiment was adopted to select the best varieties in the new e-clolgical environments so that the new varieties selected are stronger in drought resis-tance than the conventional varieties.