大麦不同粒位粒重和蛋白质含量及发芽整齐度研究

测定了大麦不同穗数株及5个品种（系）不同粒位（顶部、中部和底部）籽粒的粒重、蛋白质含量和发芽率。结果表明：不同穗数株及品种（系）各粒位间籽粒千粒重的差异表现相同的趋势，即中部最大，顶部和底部较小。不同穗数株主茎穗各粒位籽粒蛋白质含量的最大值，1穗株为顶部，2穗株为中部，3穗株则为底部；各品种（系）主茎穗和分蘖穗不同粒位蛋白含量加权平均值均以秀麦3号为最大，97－33最小，且主茎穗各粒位蛋白含量以顶部为最高，不同穗数株各粒位籽粒发芽速度均以顶部最快，中部和底部相对较慢；品系99－18的发芽整齐度最好，吕系92－11发芽最慢且发芽率最低。

Studies on grain weight, protein content and germinating performance of the grains from different ear positions for barley

Grain weight, protein content and germinating performance of the barley grains from different ear positions (top, middle and bottom) were measured It is showed that grain weight of middle positioned grains is higher than that of both top and bottom positioned grains for plants with different ear number per plant and for 5 cultivars The top grains in the plants with one ear , the middle grains in the plants with two ears and the bottom grains in the plants with three ears, have the highest protein content among all grains on the main shoot ears, respectively On an average of all grains, including main shoot and tiller ears, Xiumai 3 contains the highest protein content, while 97 33 is the lowest In a main shoot ear, top grains contain the highest protein content The top grains germinate fast and best, irrespective of the ear number per plant Among the cultivars in study, 99 18 shows the best germinating performance and 92 11 the worst