To improve egg production performance of local chicken breed in Guizhou Province, Libo Yaoshan chicken, with dopamine receptor 2 （ DRD2 ） as one of the candidate genes, we detected its genetic variation in 196 Libe ...To improve egg production performance of local chicken breed in Guizhou Province, Libo Yaoshan chicken, with dopamine receptor 2 （ DRD2 ） as one of the candidate genes, we detected its genetic variation in 196 Libe Yaoshan hens using PCR-SSCP （single-strand conformation polymorphism） and sequencing method, and analyzed the correlation between genetic variation and egg production traits. The results showed that TT and TG genotypes in mRNA SNlX）62 （C→T） loci of the DRD2 gene had extremely significant difference in egg production at 38 weeks age （P 〈0.01 ）, and significant difference in egg weight at 300 days age （P 〈0.05 ）. The single nucleotide polymorphisms （SNPs） mutation induced synonymous mutation of the 312th amino acids （leucine） in DRD2 protein, from L （CTG） to L （TI＇G）. The mRNA SNP962 （C→T） loci had a larger genetic effect on egg production at 38 weeks age, and could be used as a molecular marker in early breeding of Libo Yaoshan chicken.展开更多
The crystallization of amorphous LiBO2 and its phase transition have been investigated by the X-ray diffraction, thermal analysis and infrared absorption spectrum. As the amorphous LiBO2 crystallizes, the metastable p...The crystallization of amorphous LiBO2 and its phase transition have been investigated by the X-ray diffraction, thermal analysis and infrared absorption spectrum. As the amorphous LiBO2 crystallizes, the metastable phase δ-LiBO2 is formed first. The boron-oxygen group in crystal of the δ-phase is similar to that in amorphous LiBO2. As the temperature rises, the δ-phase transforms to the γ-phase, which cannot be prepared at ordinary pressure, and then the γ-phase transforms to the α-phase. Structural relaxation takes place before crystallization. At an equal rising rate of temperature, the larger the particle size of amorphous LiBO2 is, the higher the crystallization temperature will be.展开更多
Under the background of global tourism development,the planning and design of rural tourism landscape in Libo Yaoshan Ancient Village in the buffer zone of a world natural heritage site were discussed.Through the anal...Under the background of global tourism development,the planning and design of rural tourism landscape in Libo Yaoshan Ancient Village in the buffer zone of a world natural heritage site were discussed.Through the analysis of the current resources and characteristics of Yaoshan Ancient Village,the planning and design principles of cultural inheritance and innovation,ecological protection and sustainable development,and integration of landscape diversity and experience based on the concept of global tourism were clarified.A specific planning and design scheme for tourism landscape was put forward,such as creating the entrance service area,core sightseeing area,rural sightseeing area,folk experience area and other functional divisions.Besides,traffic routes should be optimized and adjusted,and the supporting construction of tourism service facilities should be strengthened to comprehensively improve the overall quality of rural tourism landscape of Yaoshan Ancient Village,promote the sustainable development of local rural tourism,and provide useful reference for the planning and design of rural tourism landscape in other similar areas.展开更多
基金Supported by Breeding and Demonstration Promotion of New Yaoshan Chicken Strains(QNYZ[2014]008)Key Gene Screening of Broodiness Breeding of Yaoshan Chicken(QKHJ[2014]2012)Doctoral Starting up Foundation of Guizhou Institute of Animal Husbandry and Veterinary in 2014:STAT5Gene Mutation Detection of Yaoshan Chicken and Associated Analysis with Egg Production Traits&CDS Region’s Cloning and Differential Expression of ONECUT1 Gene in Yaoshan Chicken and Associated Analysis with Production Traits(QKH LH[2015]7067)
文摘To improve egg production performance of local chicken breed in Guizhou Province, Libo Yaoshan chicken, with dopamine receptor 2 （ DRD2 ） as one of the candidate genes, we detected its genetic variation in 196 Libe Yaoshan hens using PCR-SSCP （single-strand conformation polymorphism） and sequencing method, and analyzed the correlation between genetic variation and egg production traits. The results showed that TT and TG genotypes in mRNA SNlX）62 （C→T） loci of the DRD2 gene had extremely significant difference in egg production at 38 weeks age （P 〈0.01 ）, and significant difference in egg weight at 300 days age （P 〈0.05 ）. The single nucleotide polymorphisms （SNPs） mutation induced synonymous mutation of the 312th amino acids （leucine） in DRD2 protein, from L （CTG） to L （TI＇G）. The mRNA SNP962 （C→T） loci had a larger genetic effect on egg production at 38 weeks age, and could be used as a molecular marker in early breeding of Libo Yaoshan chicken.
基金Project supported by the National Natural Science Foundation of China
文摘The crystallization of amorphous LiBO2 and its phase transition have been investigated by the X-ray diffraction, thermal analysis and infrared absorption spectrum. As the amorphous LiBO2 crystallizes, the metastable phase δ-LiBO2 is formed first. The boron-oxygen group in crystal of the δ-phase is similar to that in amorphous LiBO2. As the temperature rises, the δ-phase transforms to the γ-phase, which cannot be prepared at ordinary pressure, and then the γ-phase transforms to the α-phase. Structural relaxation takes place before crystallization. At an equal rising rate of temperature, the larger the particle size of amorphous LiBO2 is, the higher the crystallization temperature will be.
基金Sponsored by the Guizhou Provincial Key Technology R&D Program:A Study on the Conservation Model with Technology and Sustainable Development Demonstration of the World Natural Heritages in Guizhou(No.2202023QKHZC).
文摘Under the background of global tourism development,the planning and design of rural tourism landscape in Libo Yaoshan Ancient Village in the buffer zone of a world natural heritage site were discussed.Through the analysis of the current resources and characteristics of Yaoshan Ancient Village,the planning and design principles of cultural inheritance and innovation,ecological protection and sustainable development,and integration of landscape diversity and experience based on the concept of global tourism were clarified.A specific planning and design scheme for tourism landscape was put forward,such as creating the entrance service area,core sightseeing area,rural sightseeing area,folk experience area and other functional divisions.Besides,traffic routes should be optimized and adjusted,and the supporting construction of tourism service facilities should be strengthened to comprehensively improve the overall quality of rural tourism landscape of Yaoshan Ancient Village,promote the sustainable development of local rural tourism,and provide useful reference for the planning and design of rural tourism landscape in other similar areas.
