| 长江草鱼♀×珠江草鱼♂杂交子一代与其亲本一龄阶段生长性能和体型分析 |
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| 引用本文： | 傅建军,王荣泉,刘峰,宣云峰,朱树人,李家乐.长江草鱼♀×珠江草鱼♂杂交子一代与其亲本一龄阶段生长性能和体型分析[J].农业科学与技术,2009,10(5):119-122. |
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| 作者姓名： | 傅建军 王荣泉 刘峰 宣云峰 朱树人 李家乐 |
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| 作者单位： | [1]上海海洋大学省部共建水产种质资源发掘与利用教育部重点实验室,上海201306 [2]江苏省吴江市水产养殖有限公司,江苏吴江215221 |
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| 基金项目： | 国家大宗淡水鱼类产业技术体系项目，上海市重点学科建设项目，上海市科委基础重大项目 |
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| 摘 要： | 目的]研究杂交草鱼一龄阶段的生长和体型特点。方法]建立长江自交YR（长江群体♀×长江群体♂）、珠江自交ZR（珠江群体♀×珠江群体♂）、杂交F1（长江群体♀×珠江群体♂）3个组合。为了避免前期生长差异对后期试验的影响，亲鱼催产至鱼苗下塘均同步进行，控制夏花培育过程养殖密度、养殖环境等条件保持一致；另一方面，到5013龄即对3个组合进行剪鳍标记同箱混养，克服不同网箱的影响。对3个组合鱼的生长和形态数据进行测量分析。体重（w）用电子天平测量，全长（TL）、体长（SL）、头长（HL）、体高（BH）和体宽（BW）用游标卡尺测量。绝对增重率AGR（g／d）=（w2-w1）／（t2-t1）；超亲杂种优势HB％（％）=（F1-BP）×100／BP。其中，AGR为50～170日龄的绝对增重率；W2-W1为饲养50～170d的体增重；t2-t1为两阶段的间隔天数；E为杂交一代某性状的平均值；BP为优良亲本某性状的平均值。体型分析利用体长／全长、头长／全长、体高／体长及体宽／体长4个比例参数进行比较。结果]体重、体长及绝对增重率均为F1〉ZR〉YR；体重、体长，在50日龄组合间差异不显著（P〉0．05），在170日龄组合间差异均极显著（P〈0．01）；绝对增重率，F1分别比ZR、YR高20．00％、50．00％，F1与ZR差异不显著（P〉0．05），与YR差异显著（P〈0．05）；F1在体重上表现明显的超亲杂种优势（20．09％）。3个组合间，体长／全长差异不显著（P〉0．05），头长／全长、体高／体长及体宽／体长差异显著（P〈0．05），F1表现头短、体高、体宽等特点。结论]F1在生长性能和体型特征上均具有优势。
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| 关 键 词： | 草鱼 杂交 生长性能 体型参数 |
Comparative Analysis on Growth and Morphology in Yangtze River ♀, Zhujiang River ♂ and Their F1 Hybrids of Juvenile Grass Carp |
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| FU Jian-jun,WANG Rong-quan,LIU Feng,XUAN Yun-feng,ZHU Shu-ren,LI Jia-le.Comparative Analysis on Growth and Morphology in Yangtze River ♀, Zhujiang River ♂ and Their F1 Hybrids of Juvenile Grass Carp[J].Agricultural Science ＆ Technology,2009,10(5):119-122. |
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| Authors: | FU Jian-jun WANG Rong-quan LIU Feng XUAN Yun-feng ZHU Shu-ren LI Jia-le |
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| Institution: | 1. Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Shanghai Ocean University, Ministry of Education, Shangha 201306; 2. Jiangsu Wujiang aquiculture Co., Ltd, Wujiang 215221) |
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| Abstract: | Objective] The aim of this study was to investigate the growth and morphological characteristics of juvenile hybrids of grass carp. Method] Three inbred generations of YR （Yangtze River stock ♀×Yangtze River stock ♂ ）, ZR （Zhujiang River stock ♀ ×Zhujiang River stock♂ ） and hybrids F1 （ Yangtze River stock ♀ × Zhujiang River stock ♂ ） were established, and their growth or morphological data were also measured. Result] The orders of body weight, standard length and absolute growth rate were F1 〉 ZR 〉 YR. No significant difference was found in body weight or standard length of 50 day-old generations （ P〉0. 05）, while there was an extremely significantly difference in those of 170 day-old generations （ P 〈0.01 ）. However, the absolute growth rate of F1 was 20.00% and 50.00% higher than that of ZR and YR respectively, and no significant difference was found between F1 and ZR （ P 〉 0.05）, but significant difference between F1 and YR （ P 〈 0.05）. F1 showed a significant hybrid vigor with rate of 20.09%. There was no significant difference among three inbred generations in standard length/total length （ P 〉 0.05）, while significant difference in head length/total length, body height/standard length and body width/standard length （ P 〈 0.05）, which indicated that F1 had the characteristics of shorter head, higher and wider body. Conclusion]F1 has advantages in growth performance and morphological characteristics. |
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| Keywords: | Grass carp Hybrid Growth performance Morphological parameter |
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