马尾松地理起源及进化繁衍规律的探讨地

通过地史变迁、冰川影响、地形特点、生态条件的分析与植株原始形态的调查检测 ,提出四川盆地的马尾松种源是我国古老马尾松的原始类型。由于盆地的特殊地形 ,使马尾松渡过冰期的影响得以保存而生长到现在。经检测该地区马尾松针叶树脂道数目最少 ,只有大多数种源的一半 ,条叶型苗木比例最高 ,比大多数种源高 2　 6倍。树脂道少与条叶型苗木多都是较为原始的形态特征 ,证明四川盆地种源属于原始类型 ,是马尾松地理起源种群。又由于盆地东南部与外界沟壑相连 ,植物基因交流渠道通畅 ,使得马尾松从原始分布区 ,经过渡地带不断进化繁衍到全国各地

Geographical Origin and Evolution of Masson Pine

Compared with the other pinus massoniana provenances, the P. massoniana provenance in the Sichuan Basin is just half in the number of resin canals in needle and 2 6 times higher in linear leaf type seedlings. Much fewer resin channels and more linear leaf type seedlings are the prototype in morphology. The southeastern part of Sichuan Basin is open to outside, which facilitates proliferation, evolution and multiplication of P. massoniana nationwide. The results suggest that the provenance of P. massoniana in the Sichuan Basin is a prototype of modern P. massoniana in China.