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为了探明缢蛏生长性状与耐温、耐高盐性能的关系,在乐清湾的优良群体子四代的基础上,于2014年获得了27个生长性状差异的家系,对各家系前期3个月的生长性能测定后,得到了生长优势家系5个,生长速度平均家系17个,生长劣势家系5个,再经过3个月的室外培育至幼贝后,将前期生长优势和生长劣势家系取出。预实验确定了缢蛏半致死温度、盐度分别是36.5℃和35.8。以群体繁育的缢蛏作为实验对照,将各家系分别培育在盐度正常、水温为36.5℃和水温正常、盐度为35.8的环境中。方差分析和多重比较各家系存活率,结果表明:在半致死温度和盐度条件下,生长优势家系存活率高于生长劣势家系,且不同家系间耐温、耐高盐性存在显著差异(P<0.05),耐热、耐高盐性能最强的家系比最差的家系分别高了74%和50%,初步获得了耐高温和耐高盐的家系,为如何获得生长性状优良且抗逆性强的缢蛏品种提供了理论依据。
In order to find out the relationship between growth traits and temperature tolerance and high salt tolerance, 27 families with different growth traits were obtained in 2014 based on the excellent four-generation population of Yueqing Bay. Three lines After the monthly growth performance was measured, 5 families with growth predominance, 17 families with average growth rate and 5 families with unfavorable growth were obtained. After 3 months of outdoor cultivation to the young shellfish, the pre-growth and growth inferior families were removed . Pre-experiment to determine the semi-lethal temperature of 缢,, salinity were 36.5 ℃ and 35.8. In order to control the population breeding, the families were respectively cultivated in the normal salinity, water temperature 36.5 ℃ and normal water temperature, salinity 35.8 environment. Variance analysis and multiple comparisons of survival rates of different families. The results showed that the survival rate of growth-dominant families was higher than that of growth-poor families at semi-lethal temperature and salinity, and there were significant differences in temperature and salt-tolerance between different families P <0.05). The families with the highest heat-tolerance and high-salt tolerance were 74% and 50% higher than the worst families respectively. The families with high temperature and salt tolerance were initially obtained. Inverse strong 缢 蛏 varieties provide a theoretical basis.