扁蓿豆与肇东苜蓿远缘杂交品系的产草量稳定性

The Yield Stability of the Hybrids Between Pocockia ruthenica and Medicago sativa

通过三个气候区，四个研究基点，四种土壤类型，六个品系连续四年产草量稳定性分析结果表明：反交半直立型（804号）的回归系数（b＝0．99）近似于1，具有平均稳定性；反交直立型（80号）、正交回交种（805号）、反交回交种（806号）的回归系数分别为b＝1.08、1．18和1．01，均大于1，低于平均稳定性；正交直立型（801号）、正交半直立型（802号）的回归系数分别为b＝0．84、0．85，小于1，高于平均稳定性。

The yield stability was analysed with 6 strains in 3 climatic division at 4 selected sites including 4 soil types during 4 years. The result shows that: The regression coefficient (b=0. 99) of hybrid with sewi-erect stem, No. 804, is similar to 1, it has an average stability. The regnssion coefficient of hybrid with erect stem No. 803, reciprocal backcross, No. 805 and 806, are 1 .08, 1. 18 and 1. 01 respectively, they are all greater than 1, so lower than average stability. The regnssion coefficient of hybrid with erect stem, No. 801 and No. 802, are 0. 84 and 0. 85 respectively, they are less than 1, so higher than average stability.