摘要： 比较不同罗非鱼品系的耐寒性能,为耐寒罗非鱼品种的选育提供育种材料及理论支撑。通过室内人工低温胁迫的方式,对8个品系罗非鱼和15个尼奥杂交罗非鱼品种进行耐寒能力的测定,比较分析它们的耐寒性能。试验发现3个品系奥利亚罗非鱼的半数死亡温度分别为:美国品系奥利亚罗非鱼7.82℃,夏奥1号8.22℃,广东品系8.44℃,死亡率分别为56.76%,62.25%,79.43%;5个品系尼罗罗非鱼中,美国品系、埃及品系、广东品系、泰国品系和吉富品系半数死亡温度分别为8.86,9.39,9.30,9.57,10.13℃,死亡率分别为70.43%,56.43%,67.24%,83.54%,91.66%;15种尼奥杂交配套系组合罗非鱼中,以埃及品系尼罗罗非鱼为母本,美国品系奥利亚罗非鱼为父本的杂交鱼的耐寒能力最强,其半致死温度为8.22℃,死亡率为51.06%。对各品种及品种间的半致死温度和死亡率进行相关分析,结果显示各品种的半致死温度和死亡率相关性极显著。尼奥罗非鱼耐寒性能与亲本高度相关,其耐寒能力可能通过细胞质遗传,加强对母本的筛选可获得更快的遗传进展。经过耐寒性能的比较,确定以埃及品系尼罗罗非鱼与美国品系奥利亚罗非鱼为尼奥罗非鱼杂交的耐寒育种材料。
关键词:
罗非鱼,
耐寒性能,
半致死温度,
低温死亡率
Abstract: Compared the cold hardy capacity in different tilapia strains for providing cold hardy capacity tilapia breeding with breeding materials and theoretical support.Through the indoor artificially low-temperature stress,measured eight strains tilapia and 15 hybridized by tilapia varieties′ cold-tolerance,and compared their cold hardy capacity.In 3 strains aureus tilapia Oreochromis aureus,the semi-lethal low temperature respectively were:the USA strains 7.82℃,summer strains 8.22℃,guangdong strains 8.44℃;and mortality respectively were:56.76%,62.25%,79.43%;in 5 strains Nile tilapia the semi-lethal low temperature respectively were;the USA strain 8.86℃、Egypt strain 9.39℃,Guangdong strain 9.30℃,Thailand strain 9.57℃,Gift strain 10.13℃,and the mortality respectivelywere:70.43%,56.43%,67.24%,83.54%,91.66%;In 15 hybrid strains,the strongest cold-tolerance was the strain from Nile tilapia of Egypt strain as female and the USA strain of aureus tilapia Oreochromis aureus as paternal,that semi-lethal low temperature was 8.22℃ and mortality was 51.06%.And semi-lethal low temperature and mortality of correlation showed significant between each species and varieties.Hybrid strains tilapia′ cold hardy capacity were highly correlated with their parents,their cold-tolerance may inheritance by cytoplasmic.To strengthen the screening of the female can obtain faster genetic progress.Through cold hardy capacity performance comparison,determinated the hybridization tilapia from the Egypt strain of Nile tilapia as female and the USA strain of aureus tilapia Oreochromis aureus as paternal for cold hardy capacity breeding materials.
Key words:
Tilapia,
Cold hardy capacity,
Semi-lethal low temperature,
Low temperature-mortality
中图分类号:
林勇, 卢其西, 杨慧赞, 陈忠, 黄姻, 甘西, 曾兰, 唐章生. 八种品系罗非鱼及其尼奥罗非鱼耐寒性能的比较试验[J]. 华北农学报, 2011, 26(S1): 278-282. doi: 10.7668/hbnxb.2011.S1.056.
LIN Yong, LU Qi-xi, YANG Hui-zan, CHEN Zhong, HUANG Yin, GAN Xi, ZENG Lan, TANG Zhang-sheng. Analysis of Cold Hardy Capacity in Eight Strains Tilapia and Their Hybridizations[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2011, 26(S1): 278-282. doi: 10.7668/hbnxb.2011.S1.056.