CAJ | 학술논문

　　利用7个凡纳滨对虾(Litopenaeus vannamei)引进群体,通过双列杂交和巢式交配设计构建家系,建立育种基础群体,估计体重、存活性状的遗传参数和基因型与环境互作效应(genotype by environment interactions, G×E)。结果表明,凡纳滨对虾基础群体体重和存活性状的遗传力估计值范围分别在(0.19±0.09)-(0.43±0.09),(0.27±0.04)-(0.45±0.06),均属于中高遗传力水平,并且统计检验显著(P<0.05)。Z-score 检验表明,体重和存活性状遗传力估计值在河北黄骅(HBHH)和青岛鳌山(QBAS)两个测试场间差异均不显著。体重和存活性状的表型和遗传相关系数分别为?0.007和?0.008,表现为低度线性负相关。对于体重和存活性状, HBHH和QBAS场间的遗传相关分别为0.83±0.04和0.40±0.11。体重性状的G×E效应不显著(K<0.5),但存活性状存在显著的G×E效应(K>0.5)。上述结果显示,凡纳滨对虾基础群体体重和存活性状的遗传变异丰富,多代选择可获得较大的遗传进展。
　　이용7개범납빈대하(Litopenaeus vannamei)인진군체,통과쌍렬잡교화소식교배설계구건가계,건립육충기출군체,고계체중、존활성상적유전삼수화기인형여배경호작효응(genotype by environment interactions, G×E)。결과표명,범납빈대하기출군체체중화존활성상적유전력고계치범위분별재(0.19±0.09)-(0.43±0.09),(0.27±0.04)-(0.45±0.06),균속우중고유전력수평,병차통계검험현저(P<0.05)。Z-score 검험표명,체중화존활성상유전력고계치재하북황화(HBHH)화청도오산(QBAS)량개측시장간차이균불현저。체중화존활성상적표형화유전상관계수분별위?0.007화?0.008,표현위저도선성부상관。대우체중화존활성상, HBHH화QBAS장간적유전상관분별위0.83±0.04화0.40±0.11。체중성상적G×E효응불현저(K<0.5),단존활성상존재현저적G×E효응(K>0.5)。상술결과현시,범납빈대하기출군체체중화존활성상적유전변이봉부,다대선택가획득교대적유전진전。
Genetic parameters and genotype by environment interaction (G×E) were obtained for body weight and sur-vival of Pacific white shrimp Litopenaeus vannamei using full-sib and half-sib families from cultured brood females col-lected from seven introduced populations. The heritability estimates for body weight and survival in the base population all ranged from moderate to high [(0.19±0.09) to (0.43±0.09), (0.27±0.04) to (0.45±0.06)] and were significantly different from zero (P<0.05). The heritabilities estimated between two farm units (HBHH and QDAS) at different locations (Huanghua city and Qingdao city) were not significantly different from each other (P>0.05) for body weight and survival using Z-score test. There was a low phenotypic and genetic correlation between body weight and survival (?0.007 and?0.008).The genetic correlations between HBHH and QDAS farms were 0.83±0.04 for body weight, and 0.40±0.11 for survival. These correlations suggest that a low G×E effect for body weight (K<0.5), but a high G×E effect for survival (K>0.5). The results show that there is quite substantial additive genetic variance for body weight and survival in Pacific white shrimp that can be exploited through selective breeding.