火炬松和湿地松原产美国东南部。本文对引种于我国的火炬松和湿地松染色体组型作了初步的比较，研究结果如下。1材料和方法种子材料由湖北省林科院提供。种子经双氧水消毒后，置培养皿中，在25C恒温条件下催芽。待胚根长至Zcm左右时，切取约0．Zmm的根尖，用饱和a一演第液处理4 Loblolly pine and Slash pine origin of the southeastern United States. In this paper, a preliminary comparison of chromosome constitutions of Pinus taeda and Slash pine introduced in our country was made. The results are as follows. 1 Materials and Methods Seed materials provided by the Academy of Forestry, Hubei Province. Seeds were sterilized by hydrogen peroxide, set Petri dishes in 25C constant temperature conditions germination. When the radicle reaches about Zcm, cut about 0. Zmm’s apical, with a saturated solution a treatment solution 4