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N China's Inner Mongolia launches homegrown ‘Breeding No.2’ gene chip for quality dairy cattle breeding_我的网站

A |     国庆节假期，沈白高铁抚顺站综合交通枢纽工程建设正酣。

B |     

    Cattle Photo: VCG
North China's Inner Mongolia Autonomous Region has launched a genomic breeding tool for dairy cattle, also known as a gene chip, enabling precise screening for key traits such as high milk yield, high fertility, disease resistance and longevity, and marking a fresh breakthrough in China's dairy cattle breeding technology, the Inner Mongolia Daily reported on Saturday.
As an iteration of the previous generation dairy cattle breeding array, which holds proprietary intellectual property rights, the new-generation "Breeding No.2" breeding array was led by the National Center of Technology Innovation for Dairy and developed by Youran Dairy Saikexing, with upgrades in loci coverage, compatibility and gene-trait prediction algorithms. 
The "Breeding No.2" breeding array covers about 50,000 loci across the dairy cattle genome, with a focus on functional loci tied to milk production, reproduction, disease resistance and length of productive life. It has achieved a sample call rate of 99.65 percent and a genotyping concordance rate of 99.91 percent for duplicate samples, and is compatible with mainstream international chips, allowing historical breeding data to be shared and reused. 
Drawing on a phenotype database and genome resequencing data to optimize a proprietary algorithm, advancing breeding evaluation from qualitative screening to quantitative assessment, bringing the accuracy of breeding stock selection up to advanced international levels, according to the report. 
The breeding array enables more precise genomic selection of calves at an early stage, substantially shortening the generation interval in breeding bull selection and cutting spending on raising low-performing replacement heifers. Compared with imported high-density chips, the "Breeding No.2" chip carries a lower per-sample testing cost and delivers stronger input-output returns, making it highly suited to large-scale dairy cattle breeding operations in China, the report said. 
Global Times
。10月5日，走进一期工程地下停车场建设现场，9台高耸的桩机映入眼帘，近千根基桩已经“露头”，十余台挖掘机联合作业，运土卡车穿梭不停。近百名建设者奋战在施工一线，铆足干劲全力施工。         　　沈白高铁抚顺站综合交通枢纽工程是沈白高铁配套项目的重要组成部分，将与沈白高铁同步建成投入使用。建成后将实现铁路与公路客运“零换乘”的无缝衔接，方便旅客接送，提升出行效率。

C |          　　工程现场管理负责人刘吉世正在指挥一台桩机调整打桩位置。“确定打桩点位后，我们还要进行钻孔、安装钢筋笼、水泥灌注等环节施工，每一道工序都要严把质量关，才能保证工程坚固耐用。”刘吉世说，为了不延误工期，施工方实行分项目、分段交叉作业，24小时不间断施工，同时组建“党员先锋突击队”“青年突击队”等，开展劳动竞赛，持续掀起施工高潮。         　　承台建设是施工难点之一，由于该区域位于高尔山脚下，地下水极其丰富，开挖后积水严重。

D | 刘吉世说：“我们采用了预制结构方式，既节约了时间，又避免了积水对施工质量的影响。”整个工程需要建设232个承台，采用预制结构方式建设可缩短20%以上的工期。         　　“虽然假期不能和家人团聚，但能为高铁配套项目建设贡献一份力量，感觉非常自豪。”沈白高铁抚顺站综合交通枢纽工程一期一标段总工程师邹俊松说，当下正值冲刺四季度的关键期，全体参建人员正利用一切可行办法抢抓施工进度，使项目生产建设再提速。目前，一期工程地下停车场工程已完成80%的桩基施工和20%的基坑挖掘，预计年底完成主体结构，明年将与沈白高铁同步建成投入使用。                    责任编辑：李丹。

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Published on:10:17:49