A study of selfcompatibility and pollinations and separation of offspring traits of alfalfa

Eight alfalfa cultivars from different sources were used to study the characteristics of selfcompatibility and pollination approaches. The results showed that the selfcompatibility of alfalfa among the cultivars was different, and the selfcompatibility indexes of all materials were ranged from 0 to 1.39. In which, the selfcompatibility index of 2 cultivars were over 1.00, 5 cultivars was from 1.00 to 0, and 1 cultivar was 0. The phenomenon of gradual death in batches was found in the S1 growth course, and the final survival rate was only 34.80% and 32.30%. the seed rate of selfcousins is the highest in 4 selfpollinations, so the selfpollination of selfcousins was appropriate to popularize and apply in alfalfa selfpollinate.