鹅掌楸属杂交育种研究初报

从湖北省京山县虎爪山林场鹅掌楸种源试验林中选择优良种源中的优良单株北美鹅掌楸5株、鹅掌楸10株及亚美马褂木1株作为杂交亲本,进行鹅掌楸的种内种源间杂交、鹅掌楸与北美鹅掌楸种间的正交和反交、北美鹅掌楸与亚美马褂木的回交等4种交配模式,共计75个杂交组合。获得球果1 162个,种子171 992粒,出苗4 131株,当年保存64个杂交组合,2 796株。综合4种交配模式,亲本及亲本交互作用对于杂交所获球果形态特征、1 a生苗木生长量等具有极显著的影响;母本对种子田间发芽率具有极显著影响,而父本对其影响不显著。

Preliminary Study on Cross Breeding in Liriodendron

5 Liriodendron tulipifera,10 Liriodendron chinensis and 1 Liriodendron sino-americanum which were superior individuals were chosen as the crossing parents from the provenance trial forest of Liriodendron in Jingshan County,Hubei province.4 mating patterns were conducted including intraspecific hybridization between from L.chinensis different provenances,cross and reciprocal cross between L.chinensis and L.tulipifera,backcross of L.tulipifera×L.sino-americanum,amounting to 75 cross combinations.1 162 cones were obtained and 171 992 seeds were produced.4 131 seedlings were raised with 64 cross combinations,and 2 976 individuals survived after one growing season.The parents and the interactions among them had significant effects on cone morphology characteristics and growth of annual seedling.Female parent had significant effects on field germination rate,while male parent did otherwise.