小麦新品种云麦68丰产稳产性及产量构成因素的分析

Analysis of Yield Potential,Stability and Components of A New Wheat(Triticum aestivum L.) Variety Yunmai 68

[目的]为了解小麦（TriticumaestivumL．）新品种云麦68的丰产、稳产、适应性及产量构成因素与产量的相关性。[方法]对云麦68的2009—2011年度云南省区域试验数据进行统计分析。[结果]云麦68具有较突出的丰产性，稳产性好，适应性广，是适合云南省大面积种植的小麦新品种，有良好的应用前景。相关分析结果表明，有效穗与产量呈显著正相关，穗粒数、千粒重均与产量相关不显著。通径分析结果表明，有效穗对产量的直接作用最大，其次是千粒重，穗粒数的作用最小。增加有效穗，提高千粒重是其高产的关键。[结论]该研究可为云麦68在生产上进一步推广应用提供科学依据。

[ Objective ] The aim was to know the yield potential, yield stability, suitability of a new wheat variety Yunmai 68 and the relation be- tween its yield and yield components. [ Method] The data from the regional tests of wheat varieties in Yunnan Province during 2009 - 2011 were analyzed statistically. [ Result] Yunmai 68 had high-yielding, good stability and wide adaptability, which was suitable for the large area produc- tion in Yunnan Province and had a good prospects. Correlation analysis results showed that the grain yield was significantly correlated with the number of spikes, but it had no significant correlation with the number of grains per spike and 1000-grain weight. Path analysis results showed that the number of spikes had the greatest direct and positive effect on the grain yield, followed by 1000-grain weight, and the number of spikes had the least effect. Increasing the number of spikes and 1000-grain weight were the key to improve the yield. [ Conclusion] The study provides a scientific basis for further promotion and application of Yunmai 68 in production.