Objective: Xinjiang has a continental climate and irrigated oasis agriculture. Soybean sowing acreage has been expanded year by year, so its yield gradually increased. No doubt, the development of soybean production in Xinjiang is becoming more and more important. Soybean yield traits are dependant on plant height, stem section number, pod number per plant, grains per plant, grain weight and other forms. At the same time, yield is also a composite character, decided by plant height, stem section number, pod number per plant, grains per plant, kernel weight, and many other factors. This paper aims to study the correlation between the yield of the main soybean cultivars and their yield traits so as to provide a reference index for breeding or improving new varieties in Xinjiang. Method: Gray correlation analysis of eight cultivars planted in 2010 in Shihezi area, Northern Xinjiang was conducted in this paper. Conclusion: Soybean production yield traits associated with major degrees from high to low is shown as follows: kernel weight > plant grains > stem section number > number of pods per plant > plant height. The result has practical significance for setting the goals of breeding or improving soybean varieties.
