【摘要】 通过对陕西省东渭北旱地小麦品种演变的研究分析，表明株高呈降低趋势，单株产量、千粒重、蛋白质含量均表现增加趋势，分蘖习性亦表现增加趋势；遗传参数估算结果表明：穗粒数、千粒重、结实小穗、穗长的广义遗传力较高，但适宜渭北旱地种植推广的高产抗旱兼用品种资源亟待充实和提高。更多还原

【Abstract】 The study and analysis of wheat,variety succession on Weibei rainfed Highland in the east part of Shaanxi Province show that the plant height tend;to de-crease,and that the yield per plant,the weight of 1000 wheat grains and protein con-tents tend to increase,and that tillering characteristics indicate a tendency to increase.The estimation of genetic parameters indicates that the nurnber of grains per spike,theweight of 1000 wheat grains.the available spikelets and spike length are high in heri-tability in a broad sense,but wheat germplasm with doal-purpose of high yield and drought resistance adaptable to rainfed farmland on Weibei highland in the east part of Shaanxi Province are urgent to be supplemented and improved.更多还原