中文摘要：

从福建平潭岛不同生境采集的野生坛紫菜，经过2～3a的筛选和培育获得野生品系b，c和d，通过体细胞酶解和自繁，获得丝状体和叶状体。实验结果表明：（1）野生选育品系b，c，d生长较快，日生长达3．25～3．75cm／d，未选育的品系a日生长为2．12cm／d，传统的养殖品种生长速度慢，日生长仅有1．37cm／d；（2）选育的品系b对高温具有明显的耐受性，在高温30℃培养10d，日平均增重率达4．34％，而对照组在水温27℃时培养5d以上，藻体就开始腐烂；（3）品系b耐低氮、磷能力较强，在低氮、磷培养条件下，第9天色泽变为浅黄色，但没有腐烂死亡，此时将藻体移至含有氮、磷的正常培养液下培养3d，藻体就可恢复正常，对照组的藻体在相同条件下，第6天藻体中部就开始糜烂，第9天叶片就有2／3溃烂；（4）在品质方面，品系b的总藻胆蛋白含量高达98．89mg／g，对照组的总藻胆蛋白含量仅有50．04mg／g；本研究结果可为坛紫菜的遗传改良、野生品系选育及利用奠定基础。

英文摘要：

The samples of wild Porphyra haitanensis were collected from different environment in Pingtan Island of Fujian Province. Through enzymolysis to somatic cells and their self-reproduction, the conchocelis and thallus of wild stain B, C and D were obtained after 2-3 years＇selection and cultivation. The results are as follows： （1） The wild-selected strain B, C and D exhibited relatively faster growth, which was about 3.25-3.75 cm/d. The thallus growth of Strain A, which has not been selected, was about 2.12 cm/d. Traditional cultivated strain exhibited the slowest growth, only 1.37 cm/d. （2）Strain B exhibited remarkable resistance to high temperature. The increasing rate of weight per day could reach up to 4.34% after cultured for 10 days in 30 ℃, while the control stain began to rot after cultured for 5 days in 27 ℃. （3） Strain B exhibited remarkable tolerance to low capacity of N and P. In low nitrogen and phosphorus environments, the blade＇s color of strain B became buff after 9 days＇cultivation. But it recovered to normal condition after cultured for 3 days in seawater of normal content of nitrogen and phosphorus. However, the control group began to rot in the middle part of blade after 6 days and the rotten proportion was about 2/3 in 9thdays in the same condition. （4） The phycobiliproteinin content of stain B was 98.89 mg/g, but the number was only 50.04 mg/g when it comes to control group. Therefore, strain B shows superiority in growth rate, high-temperature resistance and low-N-and-P tolerance. The results are helpful for genetic improvement, wild strains＇selective breeding and utilization in P. haitanensis.