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| 1 | Improving the Local Sheep in Gansu via Crossing with Introduced Sheep Breeds Dorset and Borderdale显示文摘In order to improve the meat performance of local sheep in Gansu Province,Dorset and Borderdale were introduced to crossbreed with local sheep which were Tan sheep,Small-tail Han sheep and Mongolia sheep. The offspring under different crossbreeding combinations were sampled randomly at the different growing stage to measure their growth traits so as to select optimize the crossbreeding mode. The results indicated that,for the same crossbreeding mode,the growth rate of progeny was in order F3> F2> F1; for the F3 progeny,the combinations Dorset- Borderdale- Small tail Han sheep and Dorset- Borderdale- Mongolia sheep gave a higher growth rate,with a body weight of 1. 57%,3. 17%,8. 23%,1. 15% higher in male and female individuals than the counterparts of Dorset and Tan sheep and Small tail Han sheep; for the F2 progeny,the combinations Dorset- Borderdale- Small tail Han sheep and Dorset- Borderdale- Mongolia sheep also gave a higher growth rate,with a body weight of 2. 15%,4. 53%,9. 21% and 2. 75% higher in male and female individuals than the counterparts of Dorset and Tan sheep and Small tail Han sheep; for the F1 progeny,the combination Borderdale and Small tail Han sheep assumed a higher growth rate,with a body weight of 3. 23%,6. 07%,7. 42% and 8. 66% higher in male and female individuals than the counterparts of Borderdale- Mongolia sheep and Tan sheep- Small tail Han sheep,respectively. Therefore,in the Small-tail Han sheep and Mongolia sheep producing regions,the F2 or F3progeny bred by using Dorset or Borderdale sheep as male parent to cross with local breeds,or the hybrid lambs of Small-tail Han sheep and Borderdale sheep as highly qualified commodity,would produce significant economic benefit. Moreover,the novel breeds obtained by crossing were the valuable genetic resource for breeding meat sheep. | Sun Xiaoping Liu Jianbin Zhang Wanlong Lang Xia Yang Bohui Guo Jian Feng Ruilin | 2014 | Animal Husbandry and Feed Science2014，6，5： | 3 |
| 2 | On the Relationship between the Winter Eurasian Teleconnection Pattern and the Following Summer Precipitation over China显示文摘The Eurasian teleconnection pattern(EU) is an important low-frequency pattern with well-known impacts on climate anomalies in Eurasia. The difference of low-level v-winds in several regions in the Eurasian mid–high latitudes is defined as the EU index(EUIV). In this study, the relationship between the winter EUIVand precipitation in the following summer over China is investigated. Results show that there is a significant positive(negative) correlation between the winter EUIVand the following summer precipitation over North China(the Yangtze River–Huaihe River basins). Meanwhile, an interdecadal variability exists in the interannual relationship, and the correlation has become significantly enhanced since the early 1980 s.Thus, the proposed EUIVmay have implications for the prediction of summer precipitation anomalies over China. In positive winter EUIVyears, three cyclonic circulation anomalies are observed—over the Ural Mountains, the Okhotsk Sea, and the subtropical western North Pacific. That is, the Ural blocking and Okhotsk blocking are inactive, zonal circulation prevails in the mid–high latitudes, and the western Pacific subtropical high tends to be weaker and locates to the north of its normal position in the following summer. This leads to above-normal moisture penetrating into the northern part of East China, and significant positive(negative) precipitation anomalies over North China(the Yangtze River–Huaihe River basins), and vice versa. Further examination shows that the SST anomalies over the Northwest Pacific and subtropical central North Pacific may both contribute to the formation of EUIV-related circulation anomalies over the western North Pacific. | Junhu ZHAO Liu YANG Bohui GU Jie YANG Guolin FENG | 2016 | Advances in Atmospheric Sciences2016，33，6： | 2 |
| 3 | Numerical simulation of hydrodynamic characteristics during the diversion closure in a horizontal tunnel显示文摘Based on water inrush accident of 1841 working face of Desheng Coal Mine in Wu'an, Hebei province, China, an evaluation model of hydrodynamic characteristics of the project is set up and simulated using Matlab. It is assumed that the pipe flow would transform into seepage flow when the aggregates are plugged into the water inrush channel and the seepage flow would disappear along with grouting process. The simulation results show that the flow velocity will increase with an increase in height of aggregates accumulation body during the aggregates filling process; the maximum seepage velocity occurs on the top of plugging zone; and the water flow decreases with increasing plugging height of water inrush channel. Finally, the field construction results show that the water inrush channel can be plugged effectively by the compacted body prepared with aggregate and cement slurry. | Wang Yu Du Wentang Xu Bohui Zhang Haiyang Yang Cuina | 2013 | International Journal of Mining Science and Technology2013，23，3： | 1 |
| 4 | Study for Trend of genetic Resource on Wild Yak in China显示文摘In this paper, comprehensively studied inhabit environments, population size, population density and distribution regions on wild yak, the results showed that genetic resource of wild yak has been decreased from 1950' to 1980 ', after that, and its genetic resource began to show increasing trend in nature reserves due to protection measures strengthened. | Bohui Yang Ping Yan Chunnian Liang Xia Lang Xiaoping Sun Jian Guo Xian Guo Shengli Cheng | 2005 | 中国草食动物2005，25，z2： | 0 |
| 5 | Polymorphism Analysis of RXFP2 in Different Sheep Breeds from Qinghai-Tibet Plateau of China显示文摘Relaxin/insulin-like family peptide receptor 2(RXFP2) is a robust candidate gene related to horn types in sheep.A series of independent genome-wide association studies have reported that RXFP2 underlies the existence and lack of horns.In this study,High-Resolution Melting(HRM) analysis and DNA sequencing were employed to detect the polymorphism of RXFP2 gene in three sheep breeds from Qinghai-Tibet Plateau of China(Tibetan sheep,Qinghai fine wool sheep and Alpine Merino sheep) and to determine the impacts of genotypes of RXFP2 on expression of horn phenotypes.The results showed that one single nucleotide polymorphism(SNP) was identified as RXFP 2SNP c.29389966 A > G.The frequency of genotype AA in Alpine Merino ram(polled) was significantly higher than that in Tibetan ram(horned) and Qinghai fine wool ram(horned) [x^2(1,N = 421) = 72.25,P < 0.001;x^2(1,N = 402) = 4.28,P < 0.005) ];the frequency of genotype AA in Qinghai fine wool ewe(polled) was also much higher than that in Qinghai fine wool ewe(horned) and Tibetan ewe(horned) [x^2(1,N = 196) = 42.04,P < 0.001;x^2(1,N = 192) = 24.69,P < 0.005) ].This mutation could potentially be exploited in marker-assisted selection(MAS) programs within sheep industry to breed horned or polled animals. | Megersa Ashenafi GETACHEW Tingting GUO Chao YUAN Jianbin LIU Jian GUO Ruilin FENG Chun'e NIU Xiaoping SUN Yaojing YUE Bohui YANG | 2016 | Agricultural Biotechnology2016，5，2： | 0 |
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