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1.
为了探讨河田鸡体重、体尺与屠宰性状的相关关系,为河田鸡的选育提供依据。本研究对120日龄河田鸡的体重、体尺和屠宰性状进行测定,并对各指标进行了相关性分析。结果表明：体重、体斜长、龙骨长、胸深、胸宽、胫长和胫围在公母之间存在极显著差异(P＜0.01);体重与体斜长、龙骨长、胸深、胸宽、胫长、胫围均有显著或极显著正相关(P＜0.01),其余各指标间亦有不同程度的相关;宰前体重、屠体重、半净膛重、全净膛重、腿肌重、腹脂重、皮脂重、腿肌率和腹脂率在公母之间存极显著差异(P＜0.01);宰前体重与屠体重、半净膛重、全净膛重、胸肌重、腿肌重、皮脂重、屠宰率、半净膛率、全净膛率呈显著(P＜0.05)或极显著正相关(P＜0.01),其余各指标间亦有不同程度的相关。 相似文献
2.
为了探究庄河大骨鸡IGF-Ⅰ基因的多样性与产肉性能相关的遗传标记。以庄河大骨鸡为试验材料,利用PCR-RFLP分子遗传标记技术分析了IGF-Ⅰ基因5′非编码区域的多样性与产肉性能的关系。结果表明：该基因存在AA、AB、BB 3种基因型,基因型的频率分别为0.445、0.300、0.255,A基因和B基因频率分为0.595和0.405;BB型个体的活体重、屠体重、半净膛重、全净膛重、腿肌重、平均日增重和料肉比分别显著的高于AA型和AB型(P<0.05),其他性状差异不显著(P>0.05);AB型和AA型各性状间不差异(P>0.05)。IGF-Ⅰ基因的BB型对鸡的产肉性能有显著影响,但是,其是否可以作为庄河大骨鸡产肉性能的重要遗传标记还需做进一步研究。 相似文献
3.
庄河大骨鸡ghr、igf-1基因的PCR-RFLP分析及基因聚合与产肉性能的关联分析研究 总被引：1，自引：1，他引：0
为了探究庄河大骨鸡ghr、igf-1基因聚合与产肉性能相关联的分子标记。利用PCR-RFLP标记技术和最小二乘法分析了ghr、igf-1的多态性及其2基因的聚合基因型与17周龄庄河大骨鸡产肉性能的关联。结果表明：ghr基因和igf-1基因均存在3种基因型且处在哈代温伯格平衡状态;聚合基因型GGTT、GHTT和GGKT的活重、屠体重、半净膛重、全净膛重、胸肌重、平均日增重显著的高于其他各基因型(P<0.05)。聚合基因型GGTT、GGKT、GHTT对庄河大骨鸡的产肉性能有显著影响,但是否能作为庄河大骨鸡选育的重要理论依据还有待进一步研究。 相似文献
4.
为了探讨珍禽贵妃鸡屠宰性能指标与肉品质的相关关系;试验测定了14周龄的贵妃鸡的屠宰性能和肉品质指标,并分析了两者关系;结果表明：14周龄贵妃鸡（♂/♀）体重分别为1120.67g和845.33g。公母鸡在体重、屠体重、半净膛重、胸肌重、胸肌率、腿肌重、腿肌率、腹脂重、腹脂率、肌间脂肪宽、皮脂厚上差异极其显著（P〈0.01）。公鸡的胸肌与腿肌在红度值（a）、亮度值（L）、pH、系水力上差异极显著（P〈0.01）;母鸡的胸肌与腿肌在红度值（a）、亮度值（L）、剪切力、系水力上差异极显著（P〈0.01）。胸肌剪切力与胸肌（b）、肌间脂肪宽与腿肌剪切力存在极显著负相关（P〈0.01）,相关系数分别为-0.731和-0.751;屠宰率与腿肌pH存在极显著正相关（P〈0.01）,相关系数为0.780。由此可以得出,贵妃鸡公鸡的屠宰性能优于母鸡;贵妃鸡屠宰性能分别与胸肌肉品质指标、腿肌肉品质指标存在不同程度的相关性,相关系数分别介于-0.731-0.617和-0.751-0.780。 相似文献
5.
庄河大骨鸡GHR基因的多态性及其遗传效应分析 总被引：1，自引：1，他引：0
为了探究庄河大骨鸡GHR基因的多态性与屠宰性状相关的遗传标记。以17周龄庄河大骨鸡为试验材料,利用PCR-RFLP标记技术、最小二乘法分析了GHR基因群体遗传结构与屠宰性状的关联。结果表明：GHR基因的多态性信息含量为0.285,属于中度多态,存在3种基因型,其基因型的频率分别为：0.3575、0.3825、0.26,等位基因M和N的频率为0.54875和0.45125;MM型基因型公母鸡的活体重、屠体重、半净膛重、全净膛重、胸肌重和平均日增重分别显著的高于MN型和NN型的公母鸡(P<0.05)。GHR基因的MM型对鸡的屠宰性状有显著影响。 相似文献
6.
邵伯鸡母系8周龄、20周龄体重对部分产蛋性状的影响 总被引：2，自引：0，他引：2
根据8周龄、20周龄体重将825只邵伯鸡母系母鸡分组,统计不同体重与初生蛋重、43周产蛋数之间的相互关系。结果表明:8周龄体重、20周龄体重与开产体重之间均呈极显著直线正相关(P0.01),8周龄体重、20周龄体重与开产蛋重呈极显著的正相关(P0.01),开产体重、开产蛋重与43周产蛋量之间呈极显著负相关(P0.01)。母鸡43周产蛋数与20周体重之间呈极显著相关(P0.01)。8周龄体重对43周产蛋数影响差异不显著,20周龄体重在1 300~1 600 g时,其43周产蛋数最高,可将20周龄体重作为邵伯鸡母系选种的重要参数之一。 相似文献
7.
对饲养于石河子石总场养殖场的400只10月龄的七彩山鸡,按5%(公母各10只)的数量进行随机抽样,进行胴体性状测定和相关回归研究,并进行显著性检验。10月龄七彩山鸡活体重与体尺之间回归方程为:Y=1.416 32+0.632X1-0.143X2+2.319X3(n=20 R=0.593 76 0.01P0.05);10月龄活体重与屠体重、半净膛重、全净膛重之间回归方程为:Y=1.000 8+1.683X1+0.793 2X2-2.526 7X3(n=20 R=0.611 32 0.01P0.05);10月龄七彩山鸡屠体重与各屠宰性状之间回归方程为:Y=69.327 4+0.542 3X1+4.363X2-3.269X3-38.321X4+6.76X5-5.738X6+0.673 2X7+0.654 3X8(n=20,R=0.876 583,0.01P0.05)。 相似文献
8.
由793只安卡×固始鸡F2资源群为试验材料,采用PCR-SSCP技术和DNA测序的方法对PPARα基因的编码区进行SNP检测。结果发现,外显子4存在1个多态性位点,经限制性内切酶BspHⅠ酶切后显示出EE、EF、FF 3种基因型。利用SAS8.0软件分析不同基因型对胴体品质的影响,结果表明,PPARα基因NC_006088:T32311C的多态性显著影响鸡的腹脂重和腹脂率(P0.05),而对屠体重、皮下脂肪厚、肌间脂肪带宽、半净膛重和全净膛重等无显著影响(P0.05)。EE型和EF型的腹脂重和腹脂率显著高于FF型(P0.05),而EE型和EF型之间无显著差异(P0.05)。PPARα基因影响脂肪代谢,可以作为分子标记用于鸡脂肪性状的分子标记辅助选择。 相似文献
9.
徐海长距鸡体尺性状与屠宰性状间的典型相关分析 总被引：1，自引：1，他引：0
为探明徐海长距鸡体尺性状和屠宰性状间的相关关系,在体重接近的情况下随机选取13周龄徐海长距鸡24只（12只公鸡,12只母鸡）进行体尺性能和屠宰性能测定,对各性状进行简单相关分析,并运用典型相关分析对各体尺性状和屠宰性状进行分析。结果表明：徐海长距鸡胫围、胫长、体斜长与大部分性状均呈显著或极显著相关;除肌胃重外其余屠宰性状间均显著或极显著相关。典型相关分析结果表明：徐海长距鸡第一对典型相关系数为0.967,达到了极显著水平,占总相关信息72.6%。在两组性状中起主要作用的为胫长、胸宽、半净膛重、屠体重。本研究结果对徐海长距鸡的早期选育具有一定的参考意义。 相似文献
10.
乳酸菌素对肉鸡生产性能和屠宰性能的影响 总被引：3，自引：3，他引：0
为了探讨乳酸菌素对肉鸡生产性能和屠宰性能的影响。300只1日龄健康肉仔鸡随机分为5组,每组设4个重复,每个重复15只。Ⅰ组为空白对照组,饲喂基础日粮,Ⅱ组为抗生素对照组,Ⅲ、Ⅳ、Ⅴ组分别在基础日粮中添加50,100,200 mg/kg乳酸菌素。比较各处理组对肉鸡的生产性能和屠宰性能的影响。试验期70天。结果表明,各组间平均日采食量差异不显著(P>0.05);Ⅱ和Ⅳ组平均日增重较Ⅰ组显著提高(P<0.05),而Ⅱ和Ⅳ组间的平均日增重差异不显著(P>0.05);Ⅳ组料重显著低于Ⅰ组(P<0.05),与Ⅱ组差异不显著(P>0.05)。屠宰性能方面,半净膛率和全净膛率各组间差异不均显著(P>0.05);胸肌率及腿肌率,Ⅱ、Ⅳ组较Ⅰ组显著提高(P<0.05),其他各组间差异不显著(P>0.05)。可见,添加100 mg/kg乳酸菌素可显著降低肉鸡的料重比和显著提高胸肌率及腿肌率,其结果与抗生素组相同。 相似文献
11.
Jens Jensen 《Euphytica》1979,28(1):47-56
Summary The high-lysine gene in Risø mutant 1508 conditions an increased lysine content in the endosperm via a changed protein composition, a decreased seed size, and several other characters of the seed. The designation lys3a, lys3b, and lys3c, is proposed for the allelic high-lysine genes in three Risø mutants, nos 1508, 18, and 19. Linkage studies with translocations locate the lys3 locus in the centromere region of chromosome 7. A linkage study involving the loci lys3 and ddt (resistance to DDT) together with the marker loci fs (fragile stem), s (short rachilla hairs), and r (smooth awn) show that the order of the five loci on chromosome 7 from the long to the short chromosome arm is r, s, fs, lys3, ddt. The distance from locus r to locus ddt is about 100 centimorgans. 相似文献
12.
Hongyan WEI Jian ZHOU Jinguang LU Jingzheng SONG Qiongxi YU Zhihong JIANG 《Medicinal Plant》2019,(6):27-29
[Objectives]This study aimed to establish a QAMS(quantitative analysis of multi-components by single-marker)method for simultaneous determination of four phenol... 相似文献
13.
Summary Apple and pear pollen was irradiated with doses of 0, 50, 100, 250 and 500 krad (gamma rays) and stored at 4°C and 0–10% r.h. From the in-vitro germination percentages an average LD 50 dose of about 220 krad was estimated. For both irradiated and untreated pollen a close and corresponding lineair relationship existed between germination percentage and pollen tube growth.Irradiated pollen was much more sensitive to dry storage conditions than untreated pollen, resulting in less germination and more bursting. Apparently, irradiation caused the pollen cell membrane to lose its flexibility faster than normal. Rehydration of dry-stored, irradiated pollen in water-saturated air restored germination percentages up to their initial levels. The importance of this procedure in germination trials is stressed. 相似文献
14.
Richard N. Lester 《Euphytica》1989,44(1-2):125-132
Summary An hypothesis is developed that the rapid change from wild plants into domesticated crops principally involves the selection of alleles with non-functional gene products which leads to reduced control of the highly integrated metabolism and morphogenesis previously accumulated by lengthy natural selection. Such disturbance of the genome produces altered physiological and morphological development which, although deleterious in nature, serves mankind better and has been selected. 相似文献
15.
B. Julier P. Guy C. Castillo-Acuna G. Caubel C. Ecalle M. Esquibet V. Furstoss C. Huyghe C. Lavaud A. Porcheron P. Pracros G. Raynal 《Euphytica》1996,91(2):241-250
Summary Twenty-five lucerne populations of the Medicago sativa complex, which were either diploid or tetraploid and wild or cultivated, were analysed for their resistance to four different fungal diseases and to stem nematode. Forage quality, including stem digestibility and saponin content, was also tested.Populations varied in susceptibility to the diseases caused by Colletotrichum trifolii, Verticillium albo-atrum, Sclerotinia trifoliorum and Pseudopezizza medicaginis, and to the nematode Ditylenchus dipsaci. Except for Sclerotinia rot, sativa and falcata subspecies differed in susceptibility, but this grouping of populations did not account for the full range of variation among them. However, the resistance to P. medicaginis was much lower in the sativa than in the falcata populations.Populations also varied significantly in stem fiber content and digestibility. Stem digestibility was negatively correlated to forage yield. Wild sativa and falcata populations had lower fiber content and higher digestibility than cultivated sativa populations. The medicagenic acid was the sapogenin responsible for the anti-nutritional effect of the lucerne measured by the yellow mealworm larvae Tenebrio molitor. The medicagenic acid content was lowest for the pure sativa populations, highest for the pure falcata populations, and intermediate for the French sativa varieties that have some traits originating from falcata germplasm. Some populations could be used in breeding programs to improve disease and nematode resistance, and forage quality. 相似文献
16.
In order to explore the pharmacological effects of active components of Gastrodiae Rhizoma on the central nervous system,through consulting related literatures,... 相似文献
17.
[Objectives]The purpose of this study was to investigate the effects of Pb on rhizosphere soil enzyme activity and chemical constituents of Achyranthes bidentat... 相似文献
18.
不同P-Zn配比对小麦幼苗微量元素营养的影响 总被引：2，自引：0，他引：2
采用了螯合-缓冲营养液培养方法对小麦进行了苗期培养试验,在3个P水平(0,0.6,3.0 mmol/L)和3个Zn水平(0,3,30 μmol/L)的完全组合下对小麦苗期生长及Zn、Fe、Cu、Mn营养进行了研究,旨在为小麦微肥施用提供理论依据.结果表明,P、Zn的正常供应促进了小麦生长,二者的缺乏与过量均会抑制小麦发育,且这种影响在冠部表现得更为明显.在小麦苗期,Zn与Cu的吸收存在明显的拮抗作用,但供Zn则促进了Zn和Cu的转运,而Mn转运则受到了抑制;过量供Zn时,大量Zn被转运到冠部,同时明显抑制了(Fe+Cu+Mn)的吸收总量;P的供应显著地抑制了Fe的吸收,但P的供应提高了Zn、Cu、Mn的转运率;P、Zn在对Zn与Fe、Cu、Mn间吸收竞争的影响中,Zn本身的影响要比P的影响更为明显,供Zn明显促进了小麦幼苗对Zn的吸收;在小麦幼苗冠部,Zn与Fe的竞争中,供P利于Zn的吸收,缺P则利于Fe的吸收;而Zn与Cu以及Zn与Mn间的竞争中,缺磷时利于Zn的吸收,供磷后则利于Cu和Mn的吸收.总之,小麦幼苗Zn、Fe、Cu、Mn营养中,P、Zn的不同配比会不同程度地改变Zn与Fe、Cu、Mn的协同或拮抗效应. 相似文献
19.
Summary
Glycine tabacina (Labill.) Benth. is a wild perennial species related to the cultivated soybean, G. max (L.) Merr. It is composed of diploid (2n=40) and tetraploid (2n=80) cytotypes. Currently, to differentiate the cytotypes, plants are grown out in the greenhouse and chromosome counts made on pollen mother cells. It is a laborious and time consuming process. The objective of this study was to determine whether electrophoretic techniques could be utilized to separate the cytotypes. Electrophoretic examination of seven isozyme systems from seed of 67 G. tabacina accessions revealed banding patterns that could be used to differentiate between diploid and tetraploid cytotypes in the species. Among the tetraploid accessions, the number of bands observed were always greater than the diploids. Some tetraploid banding patterns consisted of bands similar to the diploid tabacina and/or additional bands previously identified in other Glycine species. The patterns of isozyme multiplicity and variation in the tetraploid tabacinas suggests more than one mode of origin for the tetraploids. 相似文献
20.
Summary Some photosynthetic characters as-leaf anatomy, leaf photosynthetic rate and CO2 compensation pointdistinguishing C3 and C4 plants and physiological characters as leaf area ratio, nitrogen content, leaf stem ratio and total shoot-to-root and deep root-to-shoot ratios have been studied in rice × sorghum and rice × wheat hybrids. Rice × sorghum 1. has lower values of photosynthetic rate, leaf nitrogen, total root and deep root-to-shoot ratio and CO2 compensation point as of rice parent where as, rice × sorghym 2. is superior in all these characters. Both hybrids lack kranz anatomy. Though both rice × sorghum hybrids show characters of C3 rice plant but rice × sorghum 2. has improved drought tolerance and leaf characters in relation to yield. Rice × wheat hybrid have higher assimilatory area and higher total root-to-shoot ratio. Grains of rice × wheat hybrids are identical to rice grain. However, as grains of rice × wheat hybrid does not contain seed coat, it could be exploited as novel rice germplasm after improvement.Abbreviations T
CO2 compensation point
- T21
CO2 compensation point at 21% O2
- T2
CO2 compensation point at 2% O2
- dR/sR
deep Root-to-shoot Ratio
- LAR
Leaf Area Ratio
- CER
photosynthetic rate
- TR/SR
Total Root-to-Shoot Ratio 相似文献