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Faster evolution of Z-linked duplicate genes in chicken

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Journal of Genetics and Genomics 2010年第10期37卷 695-702页

作者： Yan Li Liqing zhang dexiang zhang Xiquan zhang Xuemei Lu State Key Laboratory of Biocontrol and International Center for Evolutionary and Genomic Studies School of Life Science Sun Yat-Sen University Guangzhou 510275 China Beijing Institute ofGenomics Ch-inese Academy of Sciences Beijing 10029 China Key Laboratory of Conservation and Utilization ofBio-resource Yunnan University Yunnan 650091 China Department of Computer Science Virginia Polytechnic Institute and State University Blacksburg Virginia 24061-0106 USA Department of Animal Science South China Agricultural University Guangzhou 510642 China

It has been shown that duplicate genes on the X chromosome evolve much faster than duplicate genes on autosomes in Drosophila melanogaster. However, whether this phenomenon is general and can be applied to other species is not known. Here we examined this issue in chicken that have heterogametic females （females have ZW sex chromosome）. We compared sequence divergence of duplicate genes on the Z chromosome with those on autosomes. We found that duplications on the Z chromosome indeed evolved faster than those on autosomes and show distinct patterns of molecular evolution from autosomal duplications. Examination of the expression of duplicate genes revealed an enrichment of duplications on the Z chromosome having male-biased expression and an enrichment of duplications on the autosomes having female-biased expression. These results suggest an evolutionary trend of the recruitment of duplicate genes towards reproduction-specific function. The faster evolution of duplications on Z than on the autosomes is most likely contributed by the selective forces driving the fixation of adaptive mutations on Z. Therefore, the common phenomena observed in both flies and chicken suggest that duplicate genes on sex chromosomes have distinct dynamics and are more influenced by natural selection than autosomal duplications, regardless of the kind of sex determination systems.

关键词： faster evolution Z chromosome gene duplication gene expression chicken genome

Feed conversion ratio,residual feed intake and cholecystokinin type A receptor gene polymorphisms are associated with feed intake and average daily gain in a Chinese local chicken population

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Journal of Animal Science and Biotechnology 2018年第4期9卷 794-802页

作者： Zhenhua Yi Xing Li Wen Luo Zhenqiang Xu Congliang Ji Yan zhang Qinghua Nie dexiang zhang Xiquan zhang Department of Animal Genetics Breeding and ReproductionCollege of Animal ScienceSouth China Agricultural UniversityGuangzhou 510642GuangdongChina Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding and Key Laboratory of Chicken Genetics Breeding and ReproductionMinistry of AgricultureGuangzhou 510642GuangdongChina Wen’s Nanfang Poultry Breeding Co.Ltd Yunfu 527400GuangdongChina

Background: The feed conversion ratio(FCR) and residual feed intake(RFI) are common indexes in measuring feed efficiency for livestock. RFI is a feed intake adjusted for requirements for maintenance and production so these two traits are related. Similarly, FCR is related to feed intake and weight gain because it is their ratio. Cholecystokinin type A receptor(CCKAR) plays an important role in animal digestive process. We examined the interplay of these three parameters in a local Chinese chicken population.Results: The feed intake(FI) and body weights(BW) of 1,841 individuals were monitored on a daily basis from 56 to 105 d of age. There was a strong correlation between RFI and average daily feed intake(ADFI) and a negative correlation between the FCR and daily gain(r_g=-0.710). Furthermore, we identified 51 single nucleotide polymorphisms(SNPs) in the CCKAR and 4 of these resulted in amino acid mutations. The C334A mutation was specifically associated with FI and the expected feed intake(EFI)(P < 0.01) and significantly associated with the average daily gain(ADG)(P < 0.05). G1290A was significantly associated with FI and EFI(P < 0.05).Conclusion: FCR is apply to weight selecting, and RFI is more appropriate if the breeding focus is feed intake. And C334A and G1290A of the CCKAR gene can be deemed as candidate markers for feed intake and weight gain.

关键词： CCKAR Chicken FCR RFI SNP

High expression of BCL6 inhibits the differentiation and development of hematopoietic stem cells and affects the growth and development of chickens

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Journal of Animal Science and Biotechnology 2021年第3期12卷 904-916页

作者： Hongmei Li Bowen Hu Shang Hu Wen Luo Donglei Sun Minmin Yang Zhiying Liao Haohui Wei Changbin Zhao Dajian Li Meiqing Shi Qingbin Luo dexiang zhang Qinghua Nie Xiquan zhang Department of Animal Genetics Breeding and ReproductionCollege of Animal ScienceSouth China Agricultural UniversityGuangzhou 510642Guangdong ProvinceChina Guangdong Provincial Key Lab of AgroAnimal Genomics and Molecular Breeding and Key Lab of Chicken Genetics Breeding and ReproductionMinistry of AgricultureGuangzhou 510642GuangdongChina State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources South China Agricultural UniversityGuangzhou 510642GuangdongChina Division of Immunology Virginia-Maryland College of Veterinary MedicineUniversity of MarylandCollege ParkMDUSA

Background:B-cell CLL/lymphoma 6(BCL6)is a transcriptional master regulator that represses more than 1200 potential target genes.Our previous study showed that a decline in blood production in runting and stunting syndrome(RSS)affected sex-linked dwarf(SLD)chickens compared to SLD chickens.However,the association between BCL6 gene and hematopoietic function remains unknown in chickens.Methods:In this study,we used RSS affected SLD(RSS-SLD)chickens,SLD chickens and normal chickens as research object and overexpression of BCL6 in hematopoietic stem cells(HSCs),to investigate the effect of the BCL6 on differentiation and development of HSCs.Results:The results showed that comparison of RSS-SLD chickens with SLD chickens,the BCL6 was highly expressed in RSS-SLD chickens bone marrow.The bone marrow of RSS-SLD chickens was exhausted and red bone marrow was largely replaced by yellow bone marrow,bone density was reduced,and the levels of immature erythrocytes in peripheral blood were increased.At the same time,the hematopoietic function of HSCs decreased in RSS-SLD chickens,which was manifested by a decrease in the hematopoietic growth factors(HGFs)EPO,SCF,TPO,and IL-3,as well as hemoglobinα1 and hemoglobinβexpression.Moreover,mitochondrial function in the HSCs of RSS-SLD chickens was damaged,including an increase in ROS production,decrease in ATP concentration,and decrease in mitochondrial membrane potential(ΔΨm).The same results were also observed in SLD chickens compared with normal chickens;however,the symptoms were more serious in RSS-SLD chickens.Additionally,after overexpression of the BCL6 in primary HSCs,the secretion of HGFs(EPO,SCF,TPO and IL-3)was inhibited and the expression of hemoglobinα1 and hemoglobinβwas decreased.However,cell proliferation was accelerated,apoptosis was inhibited,and the HSCs entered a cancerous state.The function of mitochondria was also abnormal,ROS production was decreased,and ATP concentration andΔΨm were increased,which was related to the inhibition of apoptosis of stem cells.Conc

关键词： BCL6 Hematopoietic stem cells Mitochondrial function Runting and stunting syndrome Sex-linked dwarf chickens

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黄羽肉鸡肉质研究进展

饲料工业 2024年第11期45卷 12-20页

作者：张丽张德祥罗威罗成龙李莹杜宗亮广东省农业科学院动物科学研究所猪禽种业全国重点实验室广东省畜禽育种与营养研究重点实验室广东广州510640 华南农业大学动物科学学院农业农村部鸡遗传育种与繁殖重点实验室广东广州510642

随着国内经济的高速发展,消费者对肉类的品质、新鲜度、风味要求日益提高。黄羽肉鸡因肉质细嫩、滋味鲜美,富含人体生长发育所需的营养物质,在国内肉鸡市场占据重要位置。通常采用肉色、pH、嫩度和系水力等物理指标评定肉品优劣。肉品... 详细信息

随着国内经济的高速发展,消费者对肉类的品质、新鲜度、风味要求日益提高。黄羽肉鸡因肉质细嫩、滋味鲜美,富含人体生长发育所需的营养物质,在国内肉鸡市场占据重要位置。通常采用肉色、pH、嫩度和系水力等物理指标评定肉品优劣。肉品的风味也是消费者选购时的关注重点,风味包括肉品中氨基酸、脂肪酸、肌苷酸等风味前体物质在高温加热下经过化学反应产生的可溶性滋味化合物和挥发性香气化合物。文章从肉质的物理评定指标以及风味前体物质角度简述了我国黄羽肉鸡肉质研究进展,分析了挥发性香气化合物对肉质的影响,为探究鸡肉风味的调控机制以及肉质改良提供理论基础和研究思路。

关键词：黄羽肉鸡肉质风味物理指标化学成分

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中国特色优质鸡品种选育路径研究

中国禽业导刊 2024年第3期41卷 33-34页

作者：鲁生霞张德祥南京温氏家禽育种有限公司江苏南京211211 广东温氏南方家禽育种有限公司广东云浮527400 华南农业大学广东广州510642

种业振兴,良种先行。国内外良种无一例外都经过一代又一代选育,精挑细选培育出来的,经历了素材创新、育种技术创新、饲养管理创新、辅助工具创新之路。家禽品种选育是家禽养殖行业中非常重要的一环,处于产业链上游环节,做好品种选育从... 详细信息

种业振兴,良种先行。国内外良种无一例外都经过一代又一代选育,精挑细选培育出来的,经历了素材创新、育种技术创新、饲养管理创新、辅助工具创新之路。家禽品种选育是家禽养殖行业中非常重要的一环,处于产业链上游环节,做好品种选育从源头上赋能下游养殖公司饲养增效、提升产品质量和提高市场占有率。为了做好家禽品种选育工作,笔者认为需要从以下方面进行考虑。

关键词：家禽品种家禽养殖辅助工具选育工作市场占有率路径研究技术创新品种选育

Overview of the Development of Ground Treatment Techniques in China

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Overview of the Development of Ground Treatment Techniques i...

鸡HOXC10基因多态性与背羽性状的关联性研究

作者： dexiang zhang CCECC Fuzhou Survey and Design Institute Co. Ltd

First,this paper briefly describes the emergence and development of ground treatment techniques in China;second,outlines various ground treatment techniques;third,points out the issues in the research and development ... 详细信息

关键词： Ground treatment techniques issues recommendations

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中国家禽 2024年第1期46卷 109-113页

作者：冼远荣张燕李达鉴李丽莹姜自琴张德祥华南农业大学动物科学学院广东广州510642 广东温氏南方家禽育种有限公司广东云浮527400

试验旨在研究HOXC10基因多态性与清远麻鸡背羽性状的关联性,为适宜优质肉鸡的品种选育提供理论资料。试验以208只清远麻鸡作为研究对象,测定其99日龄时背羽的性状指标,包括背羽长度、重量、羽根长度和羽根直径,利用直接测序法检测HOXC... 详细信息

试验旨在研究HOXC10基因多态性与清远麻鸡背羽性状的关联性,为适宜优质肉鸡的品种选育提供理论资料。试验以208只清远麻鸡作为研究对象,测定其99日龄时背羽的性状指标,包括背羽长度、重量、羽根长度和羽根直径,利用直接测序法检测HOXC基因第二内含子的单核苷酸多态性(SNP)。结果显示:共筛选出6个SNPs,分别为SNP1(g.865129G>C)、SNP2(g.865204G>T)、SNP3(g.865226C>T)、SNP4(g.866122T>A)、SNP5(g.826133A>G)、SNP6(g.866270C>T)。将不同位点SNPs的基因型与背羽性状进行关联分析发现,SNP1与背羽羽根长度极显著相关(P<0.01),SNP2与背羽羽根长度显著相关(P<0.05),SNP3与背羽羽根直径极显著相关(P<0.01)。研究表明,清远麻鸡HOXC10基因的单核苷酸多态性对背羽性状有显著相关性,可作为鸡背羽性状选育的分子标记。

关键词：鸡 HOXC10基因背羽性状内含子 SNP

基于红外相机的云岭山脉南部地区花面狸的分布和活动节律研究

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野生动物学报 2024年第1期45卷 8-15页

作者：段升伟金吉辉张德祥于岱含金朝光杨士剑云南师范大学生命科学学院昆明650500 生物能源持续开发利用教育部工程研究中心云南师范大学昆明650500

2019年10月—2021年5月,利用红外相机技术对云岭山脉南部地区花面狸(Paguma larvata)的分布和活动节律进行研究。布设相机125台,共收集61个分布位点和283张独立有效照片。结果表明:花面狸在云岭山脉南部地区分布广泛,可利用多种类型生境... 详细信息

2019年10月—2021年5月,利用红外相机技术对云岭山脉南部地区花面狸(Paguma larvata)的分布和活动节律进行研究。布设相机125台,共收集61个分布位点和283张独立有效照片。结果表明:花面狸在云岭山脉南部地区分布广泛,可利用多种类型生境,但在落叶阔叶与常绿阔叶混交林、落叶阔叶林和常绿阔叶林中活动频率较高;花面狸在海拔2700~3700 m活动频率最高,不同季节的活动频率在海拔间存在显著差异(p<0.05);花面狸是夜行性动物,日活动节律呈双峰型,活动高峰为20:00—22:00和04:00—06:00;季节活动节律呈现明显差异,冬季和其他季节之间、春季和秋季之间活动节律均有显著差异(p<0.05)。

关键词：花面狸活动节律红外相机云岭山脉

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竹丝鸡屠宰体重和肤色指标相关性分析

黑龙江畜牧兽医 2024年第6期 41-45,51页

作者：冼远荣成佳乐刘同君魏国辉张德祥华南农业大学动物科学学院广州510642 广东温氏南方家禽育种有限公司广东云浮527400

为了研究竹丝鸡屠宰体重与肤色性状指标间的相关性,试验选取第8世代1日龄N611品系竹丝鸡337只(公鸡165只、母鸡172只)为研究对象,测定63日龄公鸡和70日龄母鸡的屠宰体重,同时利用色差仪测定公母鸡肩部、背部、翅下、尾椎、胸部和颈部肤... 详细信息

为了研究竹丝鸡屠宰体重与肤色性状指标间的相关性,试验选取第8世代1日龄N611品系竹丝鸡337只(公鸡165只、母鸡172只)为研究对象,测定63日龄公鸡和70日龄母鸡的屠宰体重,同时利用色差仪测定公母鸡肩部、背部、翅下、尾椎、胸部和颈部肤色L^(*)、a^(*)、b^(*)值,对上述指标及屠宰体重间的相关性进行了研究。结果表明:竹丝鸡母鸡肩部、翅下、尾椎、胸部、颈部肤色L^(*)值均显著或极显著小于公鸡(P0.05)。说明在竹丝鸡育种过程中可以将胸部肤色L^(*)值作为辅助选育指标以加快育种进展。

关键词：竹丝鸡胴体屠宰体重肤色相关性选育