首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 15 毫秒
1.
Additive, dominance genetic effects were analysed for body weight (BW) and seven morphometric traits from three variants of red common carp, Cyprinus carpio var. singuonensis, C. carpio var. wuyuanensis and C. carpio var. color, based on a diallel cross‐mating design by using the additive–dominance genetic model. The results indicated that at 8 months of age (juvenile stage), the traits of pre‐dorsal height (PDH), pre‐dorsal width (PDW) and caudal peduncle height (CPH) were mainly controlled by additive effects; the traits of BW, total length (TL), standard length (SL), head length (HL) and caudal peduncle length (CPL) were mainly controlled by dominance effects. The narrow‐sense heritabilities of all traits ranged from 0.000 to 0.556; however, the broad‐sense heritabilities ranged from 0.453 to 0.775. At 20 months of age (adult stage), the traits of TL, SL, PDH and CPL were mainly controlled by additive effects, whereas the traits of BW, PDW, HL and CPH were mainly controlled by dominance effects. The narrow‐sense heritabilities of all traits ranged from 0.000 to 0.710; the broad‐sense heritabilities ranged from 0.629 to 0.934. Through the genetic merit prediction from three parents, it was found that the additive and dominance effects of C. carpio var. color could increase the BW and body length in their progeny, but these two genetic effects of C. carpio var. singuonensis and C. carpio var. wuyuanensis could decrease BW in their progeny. The genetic effects of C. carpio var. wuyuanensis could reduce total length, SL and caudal peduncle length, but increase body height in their progeny.  相似文献   

2.
Cryopreservation of sperm of common carp, Cyprinus carpio L.   总被引:2,自引:0,他引:2  
Milt of common carp, Cyprinus carpio L. was cryopreserved in pellet form with the use of 12 extenders. Most efficient were: BE2 original extender (containing 85 mM NaCl, 50 mM KCl, 3 mm CaCl2, 1 mm MgCl2 with 10% dimethyl-acetamide (DMA) and 10% addition of hen's egg yolk) and Kurokura et al.'s extender with 15% DMA and 10% yolk (about 73% and 69% of eyed eggs, about 61% and 52% of swim-up larvae, respectively). Within the most effective treatments, survival from the eyed-egg stage to the swim-up stage was similar to that observed in the control group. Survival from the eyed-egg stage to the swim-up stage (percentage of eyed eggs was considered as 100%) was highly significantly and positively correlated with the actual rate of swim-up larvae.  相似文献   

3.
Abstract. A large tegumental tumour was observed in a common carp from the pool of the Jardin des Plantes, Montpellier. The tumour was a fibroma characterized by centripetal fibrogenesis and intense calcification of the central region.  相似文献   

4.
应用荧光DDRT-PCR从鲤外周血白细胞克隆了鲤胸腺素β(thymosinβ,Tβ)基因cDNA全序列。序列分析表明,TβcDNA全长528bp,其完整的读码框架位于40~178bp,编码46个氨基酸,5'非编码区长39bp,3'非编码区长为348bp,且具有Poly(A)加尾信号(AATAAA),将该基因序列递呈GenBank,注册序列号为AY457946。氨基酸序列同源性分析显示,鲤Tβ氨基酸序列与鲤Tβa、斑马鱼Tβa及斑马鱼Tβ-2同源性均为84%。在系统发生树上,鲤Tβ与鲤、斑马鱼、白斑狗鱼和鲑Tβa及斑马鱼Tβ2聚类。  相似文献   

5.
《水生生物资源》2003,16(5):399-407
The common carp is one of the main aquaculture species in the world. Despite this, most of the production is carried out using unselected strains. Selective breeding for fast growth has not proven to be effective in this species, but other traits (disease resistance, shape) could be successfully selected for. Most heritability estimates in the literature are unreliable due to environmental biases, but complementary results from population genetics and comparison of strains seem to indicate that there should be a potential for selective breeding in this species, including selection for growth rate, provided the base populations are variable enough (e.g. synthetic strains). New techniques such as parentage assignment with microsatellites and use of doubled haploid progenies may help describe much more accurately, without environmental bias, the genetic determination of traits of interest in the carp. This could be a new opportunity to design efficient breeding programs in this important species.  相似文献   

6.
本试验在一个镜鲤家系中,随机选取68尾作为实验鱼,在测量体重、体长、全长等数量性状的同时,利用15个微卫星分子标记对其进行遗传检测,共检测到40个等位基因,每个基因座的等位基因数为1~4个不等,平均等位基因2.66个,片段长度在132-551之间,有效等位基因数(Ne)为1.3721~3.8278,平均观察杂合度(Ho...  相似文献   

7.
利用24个鲤(Cyprinus carpio L.)EST-SSRs标记和41个SSRs标记对柏氏鲤和荷包红鲤抗寒品系回交子代的84个个体基因组DNA进行检测,共得到182个等位基因,各座位等位基因数2~4个,片段长度142~329bp,有效等位基因数1.391 3~3.935 3,观察杂合度0.321 4~1.0000,期望杂合度0.2829~0.753 5,平均位点多态信息含量0.5120.利用统计软伺FSPSS的GLM程序对65个微卫星标记与鲤鱼体质量、体长、体高和吻长的相关性进行了分析,其中与体质量、体长显著相关的标记是HLJE365;与体质量、体高显著相关的标记是HLJ816;与体质量显著相关的标记是HLJ726,与体长显著相关的标记是HLJ107、HLJ1098;与体高显著相关的标记是HLJ111、HLJ817;与吻长显著相关的标记是HLJE331、HLJ906、HLJ1330.对同一标记不同基因型间进行多重比较,找到与4种性状相关的基因型,并运用数学建模的思想定位等位基因对性状的影响.  相似文献   

8.
鲤与生长性状相关的EST-SSRs标记筛选   总被引:4,自引:0,他引:4  
以大头鲤(Cyprinus pellegrini Tchang)(母本)与荷包红鲤(Cyprinus carpio wuyuanensis)抗寒品系(父本)杂交产生的F1作为亲本,以其自交F2作为分离群体,结合"拟测交"策略,用EST-SSRs标记对其中92个个体进行基因型检测.利用Windows Map Manager 2.0的标记回归法对符合拟测交分离的70个EST-SSRs标记进行单标记回归分析,检测出8个与鲤体长、体高、体厚性状相关的标记.对同一标记不同基因型个体间生长性状进行显著性比较,通过t检验,找到与生长性状相关的基因型.将上述8个EST序列与GenBank数据库进行BLAST比对,有3条EST序列与蛋白库中已知功能的序列高度同源.其中HLJE225与编码斑马鱼(J9enio rerio)冷诱导基因RNA结合蛋白的基因同源性水平高达97%,HLJE222与编码斑马鱼DAZ相关蛋白1基因同源性水平也高达97%,HLJE599与编码斑点叉尾鲴(Ictalurus punctatus)核糖体蛋白L6基因的同源水平为87%.本研究鉴定的与鲤生长性状相关的功能基因及有利用价值的基因型,为鲤重要生长性状的QTL(数量性状基闪座)定位和分子标记辅助育种提供了一定的依据.[中国水产科学,2009,16(1):15-22]  相似文献   

9.
10.
11.
12.
为研究鲤(Cyprinus carpio L.)白细胞免疫应答相关的分子机理,以体外培养的鲤外周血白细胞为实验材料,用荧光标记的mRNA差异显示(FluoroDDRT-PCR)技术,研究丝裂原(50μg/mL LPS、50μg/mL PHA和50μg/mL ConA)在刺激白细胞4、12和24 h内诱导白细胞免疫应答相关基因的mRNA表达差异,共获得92个差异片段,其中87个片段有再扩增产物,再扩增率为94.6%;将差异片段克隆,经PCR鉴定,获得81个阳性克隆,鉴定率为93.1%;差异片段序列同源性功能分析结果表明,本研究共获得3个免疫应答相关的cDNA克隆,它们分别编码鲤的蛋白酶体激活因子PA28α亚基、翻译延伸因子(EF-1α)和基质金属蛋白酶13(Mmp13)部分序列,为进一步研究这些差异表达基因在鱼类免疫中的作用机制奠定了基础。  相似文献   

13.
Abstract. An investigation was conducted under laboratory conditions to determine the optimum food particle size of an inert diet for common carp fry ranging in size from 15 to 466mg body weight and 13 to 31 mm total length (TL). Speed of consumption of a standard quantity of food was used as a measurement of feeding preference/efficiency for different particle size ranges. It was observed that for carp of this size range preferred food particle size increases with fish size. On the basis of ingestion time and feeding behaviour, food particle sizes in the ranges 125-300μm. 300-500μm, 300-790μm and 500-1000μm diameter were found to be most appropriate for carp fry weighing 15-23mg(TL 13-18), 46-97 mg(TL 17-22), 105-209 mg (TL 20-25) and 210-466mg (TL 24-31) respectively. This study also demonstrated that for carp fry of these size ranges the mean preferred food particle sizes are about 02-04 that of mouth size. Based on this relationship, general recommendations are made on the optimum food particle sizes for different size classes of carp fry reared under hatchery and nursery conditions.  相似文献   

14.
鲤野生群体与养殖群体遗传多样性初步分析   总被引:2,自引:0,他引:2  
对野生鲤和养殖鲤品种进行了表型性状数量分析及随机扩增多态性分析。以6个10 bp的寡核苷酸片段作为引物,从鲤鱼2个品种8个个体核基因组中共扩增出309个片段,大小在0.3~2.3 kb。个体间的遗传相似度在0.516~0.862。野生鲤与养殖鲤之间的遗传相似度为0.516~0.719,野生鲤与养殖鲤之间的遗传距离为0.281~0.484。这8个个体被聚成2大类,对应着形态学上的2个品种。  相似文献   

15.
16.
Storage of common carp, Cyprinus carpio L., eggs for short durations   总被引:1,自引:0,他引:1  
In this study, a short-term storage of pre-activated eggs of the Japanese ornamental (koi) carp, Cyprinus carpio L., at three different temperature regimes is reported. Koi eggs were stored at low temperatures (6-9oC), at variable or high temperatures (12-31C) and at moderate-stable temperatures (20-24.5oC). Survival of the developing embryos was examined at the first and the second day post-activation, and in hatch-out larvae. Survival was calculated for each treatment by linear regression Y = a-bX (P± 0.01), except for eggs incubated at temperature of about 20 C(P > 0.1).The specific mortality index (b/a 100), as a ratio between the mortality rate (b) and the fertilization rate (a), indicated that the highest mortality is associated with the high and unstable storage temperatures, while the lowest mortality is with the moderate and stable storage temperatures. Eggs can be stored at moderate and stable temperatures for a maximal duration of 6h, yielding survival of hatch-out larvae higher than 50%. In two trials, fertilization potency of sperm stored in a domestic refrigerator (5-9oC) for 5h, was compared with freshly stripped sperm and no differences in fertilization rates were found between the two treatments.  相似文献   

17.
The main indication of cimetidine is being H2-receptor antagonist, but studies suggest that cimetidine may also act as a non-specific stimulant of cell-mediated immunity and immunomodulator. In order to determine the immunomodulatory effect of dietary intake of cimetidine in the common carp (100 ± 10 g), subjects were fed diets containing 0 (control), 50, 100 and 200 mg cimetidine kg?1 of dry diet for a period of 6 weeks. TLC and NBT assays were significantly (P < 0.05) stimulated in cimetidine-supplemented groups displaying the highest value in 200 mg kg?1 group. A decrease (P < 0.05) in cortisol and ACH50 value was recorded in fish treated with cimetidine. Serum protein, albumin and serum globulin levels were not significantly changed. The findings of the present investigation suggest that the incorporation of cimetidine in the diet of common carp enhances the non-specific immunity.  相似文献   

18.
首次使用R环境中的OneMap软件包,以荷包红鲤抗寒品系(♂)和云南大头鲤(♀)为祖父母本所培育的110个F2个体为作图群体,以荧光扩增片段长度多态性(fluorescent amplification fragment length polymorphism,fAFLP)为主要分子标记,采用远交全同胞家系模型构建鲤的遗传连锁图谱。结果显示,110个F2个体中共产生1513个清晰的fAFLP标记,其中多态性标记911个;另开发多态性的EST标记12个,最后总计923个标记用于构建遗传连锁图谱;采用OneMap软件包构建的遗传图谱含有238个fAFLP标记和8个EST标记分布在50个连锁群上,总图距为2876.64cM,标记间平均间距为14.68cM,图谱覆盖率为66.56%。  相似文献   

19.
Abstract. A hot-water extract of Undaria pinnatifida was found to contain polysaccharide(s) which showed immunostimulating activity in fish. In order to identify the effective component(s), the hot-water extract was fractionated and acid-soluble (Fraction I) and acid-insoluble (Fraction II) polysaccharides were evaluated for their potential to enhance protection against Edwardsiella tarda infection in common carp. Intraperitoneal injection of Fraction II in carp 6 and 3 days prior to challenge with E. tarda resulted in a significantly greater survival rate than that of control fish at doses of 10–30mgkg-1. On the other hand, Fraction I was not effective at any dose. Chemical and physicochemical analyses revealed that Fraction II was sodium alginate with a high degree of purity, with a molecular weight of 45000 and an M/G ratio of 0.8. Some commercial alginates were similarly evaluated for their efficacy. Alginates from Macrocystis pyrifera (MW, 146000-264000; M/G ratio, 0.9–1.0) significantly increased survival rate, but alginates from Lessonia nigrescens (MW, 177000–290000; M/G ratio, 1.3) had little effect. There are indications that the efficacy (protective effect) of alginates has some relationship to their M/G ratios.  相似文献   

20.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号