| 摘要: |
| 采集凡纳滨对虾(Litopenaeus vannamei)7 个不同遗传背景的亲本群体, 采用群体自繁或杂交方法获得11 个凡纳滨对虾选育群体, 分别对标准化养殖270 日龄(留种阶段)后的不同群体和不同性别个体生长性能差异进行比较分析, 根据Kung 育种值及综合评定值评估筛选亲本群体, 并对体质量性状进行选择效果预估。结果表明, 11 个群体270 日龄体长和体质量均值分别为13.52cm 和31.05g,各群体间体长和体质量性状差异均达到显著水平(P<0.05); 体重与体长回归关系达到极显著水平(P<0.01), 回归系数为0.903; 分别对各交配组合雌雄群体体长体质量均值进行t-检验分析, 差异均达到显著水平(P<0.05); 根据各群体的综合评定值大小将所有群体评定为优、良及一般3 个等级, 其中作为父本时优等级群体为GH♀×GH♂、ZX♀×ZX♂, 而作为母本时优等级群体为GH♀×GH♂和SS♀×SS♂; 进一步预估凡纳滨对虾选育G1 代的综合选择反应为1.927g。本研究可为下一阶段凡纳滨对虾家系选育基础群体的构建提供生长性能资料, 加快凡纳滨对虾的遗传改良进程。 |
| 关键词: 凡纳滨对虾 生长 Kung 育种值 选择反应 预估 |
| DOI：10.11693/hyhz20141100316 |
| 分类号: |
| 基金项目:广东省海洋渔业科技推广专项科技攻关与研发项目, A201208B05 号; 广西科学研究与技术开发技术项目, 桂科转12239002-3 号, 桂科合14125007-2-9 号。 |
|
| GROWTH PERFORMANCE COMPARISON AND SELECTION EFFECT PREDICTION FOR SELECTIVE BREEDING G0 GENERATION OF LITOPENAEUS VANNAMEI |
|
HU Zhi-Guo, LIU Jian-Yong, YUAN Rui-Peng, ZHANG Jia-Chen
|
|
Fisheries College, Guangdong Ocean University, Zhanjiang 524088, China
|
| Abstract: |
| Selective breeding is an effective way of healthy seeding and genetic improvement for Litopenaeus vannamei. We established 11 mating combinations of L. vannamei among 7 different genesis groups using inbreeding and hybridization. The growth performance for female and male among groups in 270 d experiment was compared and analyzed. The populations were selected and graded in the Kung value and comprehensive evaluation values. In addition, selection effect for body weight traits was predicted. The results show that these 11 populations of 270-day-old in age, the body length and body weight was 13.52 cm and 31.05 g. The among-population differences in body length and body weight were significant (P<0.05); the regression relationship between body weight and body length was extremely significant (P<0.01), and the regression coefficient reached 0.903. For each mating combination, t-test analysis was performed on body length and body weight, and the differences were significant or extremely significant. All the populations were assessed as excellent, good, and average levels according to the comprehensive evaluation value. Based on the above analyses, combinations of good sir and dam parents were selected. Moreover, the value of L. vannamei for breeding G1 generation was 1.927 g predicted by comprehensive selection response. The results may provide a good reference for the next phase of L. vannamei family selection, and accelerate the process of the genetic improvement. |
| Key words: Litopenaeus vannamei growth Kung value selection response prediction |
