Abstract: Medicago sativa L.cv.Longmu 807,a forage crop cultivar selected from initial population of Medicago sativa L.cv.Longmu 803,had been bred through 12 successive generations by choosing good single plant in the initial population,then asexual propagation and three time mixed choice as well as open pollination.The new cultivar had been checked by comparative tests of varieties,regional test and production test in different ecological zones.The plant is erect and the plant height reached 75.7~105.3 cm in flowering stage and 98.5~133.8 cm in maturity stage.The growing period was about 120 days and turned green during late April in Heilongjiang.The average hay yield was 11739.14 kg·hm^-2 and increased 17.10% compared with control alfalfa Longmu 803(9797.99 kg·hm^-2).The average seed yield was 284.60 kg·hm^-2,increased 18.25% compared with control alfalfa Longmu 803(230.00 kg·hm^-2).The alfalfa Longmu 807 has good palatability and its crude protein contents are 19.38% at early flowering stage.Moreover,the plant has strong resistance ability and ecological adapt ability.It is suitable to be cultivated in HeiLongjiang or other province around HeiLongjiang.

Key words: Medicago sativa L.cv.Longmu 807, Mixed selection, New variety

摘要： 从龙牧803(Medicago sativa L.cv.Longmu 803)苜蓿群体中选择优秀单株,通过无性扦插繁殖,3次混合选择、开放授粉及品种比较试验、区域与生产试验,历经12年育成龙牧807苜蓿(Medicago sativa L.cv.Longmu807)新品种。该品种株型直立,在黑龙江省地区4月中下旬返青,生育期120 d左右,开花期株高75.7~105.3cm,成熟期株高98.5~133.8 cm。2年生干草产量为11739.14 kg·hm^-2,比对照龙牧803苜蓿(9797.99 kg·hm^-2)增产17.10%;种子产量284.60 kg·hm^-2,比对照(230.00 kg·hm^-2)增产18.25%。初花期粗蛋白含量19.38%,适口性好,饲用品质优良。其抗性强,生态适应性广,适宜在黑龙江省各地及毗邻省区推广种植。

关键词: 龙牧807苜蓿, 混合选育, 新品种