| 摘要: |
| 以紫扇贝(Argopecten purpuratus)和海湾扇贝(Argopecten irradians irradians)为亲本, 建立了紫扇贝自交(ZZ)、海湾扇贝自交(HH)、紫扇贝(卵)×海湾扇贝(精)(ZH)和海湾扇贝(卵)×紫扇贝(精)(HZ)共4个试验家系。在养殖60、127 d 时测定壳高、壳长、壳厚和体质量, 并分析各养殖时期影响体质量的主要因素。结果表明: 在各养殖时期, 2 杂交家系子代的壳高、壳厚以及体质量均表现出生长优势(PPP＜0.01), 因此认为通过紫扇贝和海湾扇贝杂交方式是改善扇贝的良好方法。通径分析的结果表明, 对于自交家系, 壳长是影响体质量的主要影响因素, 但对于杂交家系HZ 来说, 壳长(60 d)和壳厚(127 d)对体质量的决定作用最大; 在杂交家系ZH, 60 d 时壳长和壳厚的协同作用对体质量的决定作用最大, 127d 时壳高的决定作用最大。因此对于两个杂交家系的选育, 应按照不同性状对体质量的决定系数选择各时期的优势性状, 以使子代的杂种优势充分表现。 |
| 关键词: 紫扇贝(Argopecten purpuratus) 海湾扇贝(Argopecten irradians irradians) 杂交家系 杂交优势 通径分析 |
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| 基金项目:国家自然科学基金项目(31172404); 国家自然科学青年基金(30901101); 农业部引进国际先进农业科学技术(948)项目(2008-Z31,2011-Z27); 青岛市科技计划项目(11-2-1-14-hy) |
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| Growth and path analyses of hybrid families between the Peruvian and bay scallop |
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| Abstract: |
| Two inter-specific hybrid families (HZ and ZH) and two inbred families (ZZ and HH) were constructed using the Peruvian scallop (Argopecten purpuratus) and the bay scallop (Argopecten irradians irradians). Their shell height, shell length, shell width and whole weight were measured on Day 60 and 127 and the major factors affecting their body weight were analyzed. The results showed obvious growth hetereosis in shell height, shell thickness and whole weight (P<0.01). Path analyses showed that shell length was the major factor affecting the whole weight for inbred families. While for the hybrid family HZ, shell length on Day 60 and shell width on Day 127 were the major factors affecting whole weight. In the hybrid family ZH, the interaction between shell length and shell width on Day 60 and the shell height on Day 127 were the major factors affecting whole body weight. Therefore, different parameters should be used in selection of the hybrid families at different stages to ensure the greatest hetereosis. |
| Key words: Argopecten purpuratus Argopecten irradians irradians hybrid family heterosis path analysis |
