| 合浦珠母贝三倍体和二倍体三个基因座位杂合度与生长的比较 |
| |
| 引用本文： | 李刚,姜卫国,沈琪.合浦珠母贝三倍体和二倍体三个基因座位杂合度与生长的比较[J].热带海洋学报,1992(4). |
| |
| 作者姓名： | 李刚 姜卫国 沈琪 |
| |
| 作者单位： | 中国科学院南海海洋研究所，中国科学院南海海洋研究所，中国科学院南海海洋研究所 广州 510301，广州 510301，广州 510301 |
| |
| 基金项目： | 广东省科委重点科研项目“合浦珠母贝多倍体育种的研究”的一部分 |
| |
| 摘 要： | 抑制第一极体(T_1组)和抑制第二极体(T_2组)形成的合浦珠母贝三倍体,其Lap-3,Pt-5和Sod-1基因座位的杂合度比野生贝或养殖贝都有提高。T_1组这三座位的平均杂合度高于T_2组。两处理组内三倍体各基因座位杂合度不一定高于同胞二倍体,在杂合座位数与大小测量间也未证实有正相关性。但三倍体的生长速度都显著高于同胞二倍体,这主要是因为三倍体性腺发育差导致能量转向体细胞生长所致。
|
| 关 键 词： | 合浦珠母贝 Pinctada martensii 三倍体 杂合度 生长 |
COMPARISON OF HETEROZYGOSITY AT THREE LOCI AND GROWTH BETWEEN TRIPLOID AND DIPLOID PEARL OYSTER, Pinctada martensii (D.) |
| |
| LI Gang JIANG Weiguo SHEN Qi.COMPARISON OF HETEROZYGOSITY AT THREE LOCI AND GROWTH BETWEEN TRIPLOID AND DIPLOID PEARL OYSTER, Pinctada martensii (D.)[J].Journal of Tropical Oceanography,1992(4). |
| |
| Authors: | LI Gang JIANG Weiguo SHEN Qi |
| |
| Abstract: | Three gene loci, Lap-3, Pt-5 and Sod-1, in two years old triploid Pinctada martensii induced by blocking the first polar body(Group T1)or the second polar body(Group T2)and in their diploid siblings were electrophoretically examined. The heterozygosity at each locus and average heterozygosity were estimated, and sizes and weights were compared between triploid and diploid siblings in each group. Results indicated that heterozygosity of each locus in our experimental groups is higher than that in wild or cultivated population. Average heterozygosity at the three loci in two groups is 1.6-4.0 times that in wild or cultivated population. Average heterozygosity in Group T1 is higher than that in Group T2. Heterozygosity at each locus in triploids is not certainly higher than that in diploid siblings, and no positive relationship between the number of heterozygous loci and the measurements has been found in either group. However in both groups the growth rate of triploidy is significantly higher than that of diploid siblings. It is essentially caused by the energy transfer to somatic tissue resulting from the sterilization of triploidy. |
| |
| Keywords: | Pinctada martensii triploidy heterozygosity growth |
| 本文献已被 CNKI 等数据库收录！ |
