CAJ | 학술논문

以广东徐闻和海南三亚2个地理群体合浦珠母贝(Pinctada fucata)为亲本,采用人工授精方法构建了33个全同胞家系。在162日龄时从每个家系随机抽取50个个体,共1650个,测量其壳长、壳高、壳宽和体质量4个生长性状,利用动物模型对4个性状进行遗传参数分析。结果表明,合浦珠母贝4个生长性状的总平均值分别为(16.28±4.46) mm、(14.85±4.39) mm、(4.58±1.52) mm、(0.66±0.67) g。4个性状的遗传力分别为0.202±0.020、0.203±0.020、0.200±0.021和0.204±0.020,均属中等遗传力,因此可以用选择育种进行遗传改良。4个性状间表型相关系数和遗传相关系数的范围分别为0.667~0.698和0.685~0.959,其中壳长、壳高和壳宽之间的遗传相关系数均低于0.7,与表型相关一致,而三者与体重间的遗传相关系数较高(0.868~0.959),其中壳宽与体质量间的遗传相关系数最高(0.959)。本研究中合浦珠母贝的4个性状为中等遗传力,并可通过对壳宽的选育来改良体质量性状。上述结果为进一步开展合浦珠母贝选择育种研究奠定了基础。
이엄동서문화해남삼아2개지리군체합포주모패(Pinctada fucata)위친본,채용인공수정방법구건료33개전동포가계。재162일령시종매개가계수궤추취50개개체,공1650개,측량기각장、각고、각관화체질량4개생장성상,이용동물모형대4개성상진행유전삼수분석。결과표명,합포주모패4개생장성상적총평균치분별위(16.28±4.46) mm、(14.85±4.39) mm、(4.58±1.52) mm、(0.66±0.67) g。4개성상적유전력분별위0.202±0.020、0.203±0.020、0.200±0.021화0.204±0.020,균속중등유전력,인차가이용선택육충진행유전개량。4개성상간표형상관계수화유전상관계수적범위분별위0.667~0.698화0.685~0.959,기중각장、각고화각관지간적유전상관계수균저우0.7,여표형상관일치,이삼자여체중간적유전상관계수교고(0.868~0.959),기중각관여체질량간적유전상관계수최고(0.959)。본연구중합포주모패적4개성상위중등유전력,병가통과대각관적선육래개량체질량성상。상술결과위진일보개전합포주모패선택육충연구전정료기출。
The pearl oyster Pinctada fucata is an economically important oyster that is used for pearl production. There is considerable focus on improving selective breeding procedures for certain traits. We used the specimens of P. fucata from two geographic populations in Xuwen, Guangdong and Sanya, Hainan as the parents to construct 33 full-sibs families by artificial fertilization. We estimated the genetic parameters of growth traits in juvenile P. fucata. Fifty 162-day-old individuals were randomly sampled from each family. Shell length, shell height, shell width, and body weight were measured, and used for genetic analysis using a maximum likelihood algorithm based on an animal model. The total phenotypic means of the four growth traits were (16.28 ± 4.46) mm, (14.85 ± 4.39) mm, (4.58 ± 1.52) mm, and (0.66 ± 0.67) g, respectively. There was a significant difference between differ-ent traits in different families, indicating that family has a significant (P<0.01) influence on growth traits in juve-nile P. fucata. The heritability of these four traits are 0.202 ± 0.020, 0.203 ± 0.020, 0.200 ± 0.021, and 0.204 ± 0.020, respectively, suggesting that there was some degree of selective potential by family selection. The pairwise phenotypic and genetic correlations between growth traits were 0.667?0.698 and 0.685?0.959, respectively. Based on our results, we predict that if one trait is improved genetically, the others will also be improved as the pheno-typic and genetic correlations between the four traits were highly positive. The genetic correlation between shell width and body weight was highest (0.959), suggesting that the best way to improve body weight is by selection for shell width.