坛紫菜新品系(Z-17)F_2、F_3的经济性状的研究

A study on the economic traits of the new Porphyra haitanensis strain(Z-17),F_2 and F_3

以人工杂交选育的坛紫菜新品系（Z-17）的F2、F3和对照组（YSX-3）的叶状体及丝状体为材料，进行高温、低氮磷实验，测定藻体的生长、4种色素含量及不同剪收次数后藻体厚度的变化等经济性状．结果表明：（1）在高温29℃下，F2和F3叶状体耐高温时间长，腐烂程度轻，其平均增长率分别为11．70％、11．55％；30℃时藻体开始腐烂；（2）在低氮磷条件下，F2适应性较强，F3次之．F2培养到第15d颜色褪为浅黄色，移至含氮磷的培养液中培养3d后部分藻体颜色恢复，细胞正常；F3在培养到第12d颜色褪为黄绿色，移至正常培养液3d可恢复正常；（3）新品系F2和F3剪收2次后，藻体厚度增长不明显，实际厚度为26～31μm；（4）4种色素蛋白含量中，F2总藻胆蛋白含量最高为89．12mg／g，叶绿素含量高达6．29mg／g；（5）F2与F3的吸收光谱值相近；（6）在25、27、29℃培养温度下，对照组的丝状体生长发育较好，但新品系丝状体成熟晚，较耐高温．

The thalli and conchocelis filaments of the new Porphyra haitanensis strain （Z-17）, F2 and F3, were obtained from artificial hybridization breeding, and the YSX-3 was used as the control group. The experiments on economic traits of the strain under the condition of high temperature resistance, low nitrogen and phosphorus were setup. The growth of the thalli, contents of the 4 pigments and thickness variations after different harvesting were studied. The results indicated： （1） F2 and F3 thalli could stand high temperature 29℃ for a long time and were not rotten easily,and the average growth rate were 11.70% and 11.55% ,respectively. However,the thalli became rotten at 30℃ ;（2） the thalli of F： were much applicability than F3 under the condition of low nitrogen and phosphorus. The thalli of F2 became pale yellow after 15-day cultured while that of F3 became yellow-green after 12-day and both of them turn to normal after 3-day cultured under the normal condition ; （ 3 ） the thickness of thalli for both F2 and F3 did not increased obviously after 2 harvests and the actual thickness was 26 - 31μm;（4） the total phycobilipro- tein in thalli of F2 was high （89.12mg/g） and the chlorophyll a was high （6.29mg/g） ,too; （5） the thalli of F2 and F3 had almost the same absorption spectrum; （6） the conchocelis filaments of the control group developed well at the 25℃ ,27℃ and 29℃. However, the new strain matured late but showed high temperature tolerance.