关键词: 黄花苜蓿, 裂荚, 荚果裂荚机械力

Abstract: Thirty Medicago falcata L. germplasms from Bole Hot Spring County,Xinjiang were used as the test material for this study. By means of the Eddberg HP-50 digital display push pull meter and the pod splitting rate of Medicago falcata L.,the mechanical force of pod splitting under horizontal/vertical placement of Medicago falcata L. pods was analyzed,which provided an accurate and efficient evaluation method for the breeding of Medicago falcata L. germline resistant to pod splitting in Xinjiang region. The results showed that the pod splitting mechanical force of wild Medicago falcata L. with high pod splitting was significantly lower than that of low pod splitting with low pod splitting (P<0.01). The mechanical force of pod splitting of Medicago falcata L. pod was positively correlated with the splitting rate under horizontal placement.When the pods were placed horizontally,Medicago falcata L. with mechanical force greater than 3.395 N was considered to be low-split pod germplasm,while Medicago falcata L. with mechanical force less than 1.885 N was considered to be high-split pod germplasm. The results show that the mechanical force of Medicago falcata L. pod cracking under horizontal placement can accurately reflect the cracking characteristics of different germplasm of wild Medicago falcata L. in Xinjiang,and provide an important reference for standardized measurement of Medicago falcata L. pod cracking characteristics.

Key words: Medicago falcata L., Pod shattering, Pod cracking mechanical force