Preliminar ystudy on intervarietal hybridization between Medicago falcata cv. Hulunbeier and Medicago sativa and screening

The intervarietal hybridizations between Medicago falcata L.cv.Hulunbeier and two varieties of alfalfa(Medicago sativa),including local alfalfa of Longmu No.801 with high-yield and cold hardiness and abroad alfalfa Caribou with more leaves.The pod numbers,seed-set rate,seeds per pod and the characters of F1 were measured.The results showed that there were significant differences in pod numbers,seed-set rate and seeds per pod under parent plants and reciprocal cross,the pod numbers and seed-set rate of Hulunbeier(♀)×Caribou(♂)were significantly higher than that in other cross combinations,and the indices in crosses were significantly higher than that in reciprocal crosses.The selected elite individuals of 84 and 5multifoliator plants,the plant height,stem-leaf ratio,branch number and forage yield per plant were superior to their parents.