[Research on Breeding of the New Rehmannia glutinosa Variety].

Objective: To breed new Rehmannia glutinosa varieties with best comprehensive properties.

Methods: By space mutation of hybrid seeds of 85-5 and Beijing No. 1,after systemic breeding, Huaidi 81 with excellent comprehensive characters was screened. Fresh weight, benchmark composition content, resistance, chlorophyll and anthocyanin content, photosynthetic characteristics of the new variety and the main cultivars were determined.

Results: Per plant fresh weight of Huaidi 81 was higher than those five main varieties and there was extremely significant difference between Huaidi 81 and other varieties,the yield of Huaidi 81( 82 353 kg / hm2) was29. 7% higher than that 5 main varieties. The catalpol content of different Rehmannia glutinosa varieties ranked in the order as follows, Beijing No. 3( 1. 601%) > Qinhuai( 1. 588%) > Huaidi 81( 1. 314%) > Godden nine > 85-5( 1. 073%) > Huaifeng( 0. 924%),the catalpol content of Huaidi 81 was in the middle, and there was no significant difference between Huaidi 81 and Godden nine,but extremely significant difference from other varieties. The acteoside content of different Rehmannia glutinosa varieties ranked in the order as follows,Huaidi 81( 0. 096%) > Qin Huai( 0. 069%) > 85-5( 0. 047%) > Beijing No. 3( 0. 035%) > Huaifeng( 0. 023%) > Golden nine( 0. 022%),the content of acteoside of Huaidi 81 was higher than those five main varieties, and there was extremely significant difference between Huaidi 81 and other varieties. Huaidi 81 had high resistance to Septoris digitalis, and had middle resistance to leaf ring rot, which indicated that Huaidi 81 had good resistance to leaf disease. Huaidi 81 with the highest chlorophyll content and moderate anthocyanin content, and had the highest photosynthetic rate.

Conclusion: The new variety Huaidi 81 with best comprehensive properties is suitable for popularizing as a new Rehmannia glutinosa variety.