西藏裸大麦品种产量及产量构成因素演变规律研究

对西藏 6 0年代以来审定通过的 15个品种进行品种比较试验 ,研究近 4 0年来裸大麦品种更换过程中产量和产量构成因素的表现和稳定性变化。结果表明 ,4 0年来 ,西藏裸大麦品种的平均产量提高了 5 0 84 % ,产量的提高是在保持一定的穗数和穗粒数的基础上增加了千粒重实现的。结合产量构成因素的演变 ,提出了今后西藏裸大麦产量育种的发展目标

Research on the Developing Regular Patterns of the Variety and Its Forming Factors of Tibet' s Naked Barley

We have made contrast experiment on Tibet's 15 Varieties examined and approved since the sixties and studied the manifestation and stability variations of the yield and its forming factors during the course of variety replacement in these forty years. The result showed that the average output of the naked barley resed to 50.84%, which was realized on the basis of impoving its spike grain of thousand as well as retaining certain mu spike number and its number of spike grain. Combined with the development of the forming factors of the yield, this paper puts up with the future developing goal of the yiled breeding of Tibet's naked barley.