The selecting and Breeding of Stylosanthes guianensis cv.Reyan No.20 Induced by Space Flight
This is the first time that selecting and breeding new stylo accessions Induced by space flight.Space exposed seed were sown and single planted,and anthracnose rating,vigor,date of flower and other agronomical characters and color of flower,hair,et al,total 14 botanical charcters were observated after inoculuation text of anthracnose pathogenetic fungi,85 lines were selected out 4 years later by individual selection and inoculuation text.After that total 26 accessions were selected from 85 lines and a series of experiment was carried out.The preliminary result showed that Stylosanthes guianensis cv.Reyan No.20 has the high yield and adaptability,resistance to anthracnose and good dry tolerace;Stylosanthes guianensis cv.Reyan No.20 also has high adaptative to sandy soil to heavy clay soil and especially can tolerance acid soil morn pH 4.0～5.0,low fertilizer soil and low phosphatic fertilizer soil.S.g.cv.Reyan No.20 adapted to plant in tropical and sub-tropical regions especially release in South-china.