苜蓿自交亲和性、授粉方式及后代性状分离的研究

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

对8份不同苜蓿Medicagosativa材料的自交亲和性及授粉方式的研究表明:参试苜蓿材料的自交亲和性存在较大差异,自交亲和指数为0～1.39,其中有2个自交亲和材料(自交亲和指数>1.00),5个自交不亲和材料(1.00≥自交亲和指数>0)和1个极端自交不亲和材料;2个自交亲和材料自交所得S1具有出苗后分批逐渐死亡的自交衰退现象,最终叶片多叶型和枝条高且分枝多型成活率分别仅为34.80%和32.30%;在4种自交授粉方式中兄妹自交结实率最高,适宜在苜蓿自交授粉中推广应用。

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.