Identification and Evaluation of Main Agronomic Traits of Buckwheat Germplasm Resources in Guangxi

【Objective】In order to excavate and utilize excellent buckwheat resources and promote the development of the buckwheat industry in Guangxi, the local germplasm resources of buckwheat collected in Guangxi were evaluated.【Method】With 58 local germplasm resources collected by census as the experimental materials, 9 major agronomic traits including growth period, plant height, main stem thickness, branch number of main stem, node number of main stem, thousand grain weight, seed number per plant, grain weight per plant and yield were identified and evaluated.【Result】The average values of growth period, plant height, main stem thickness, branch number of main stem, node number of main stem, thousand grain-weight, seed number per plant, grain weight per plant and yield were 80.57 d, 70.29 cm, 3.75 mm, 2.63, 8.68, 22.97 g, 97.02, 2.22 g and 918.7 kg/hm2, respectively And the variation degree of the traits were great, among which the coefficient of variation of grain weight per plant was maximum（27.93%）, and that of growth period was minimum（5.42%）. The correlation analysis showed that the branch number of main stem was extremely significantly correlated with the stem thickness, grain weight per plant, seed number per plant and yield, the yield was extremely significantly correlated with the node number of main stem, grain weight per plant and seed number per plant, while the correlation between yield and growth period, plant height, stem thickness and thousand-grain weight was not significant.【Conclusion】The node number of main stem, branch number of main stem, grain weight per plant, seed number per plant are the main agronomic traits affecting buckwheat yield. The morphologies of high-yield buckwheat varieties are characterized by moderate plant height, main stem with more node and branch numbers, more seed numbers per plant and moderate grain weight. Six excellent resources were selected, such as Batou buckwheat, Jianli spring buckwheat, Huangping buckwheat, Shuowan buckwheat, Guzhai triangle wheat and Wazhadi buckwheat.