Trends in in ovo sexing technologies:insights and interpretation from papers and patents

Numerous researchers and institutions have been developing in ovo sexing technologies to improve animal welfare by identifying male embryos in an early embryonic stage and disposing of them before pain perception. This review gives a complete overview of the technological approaches reported in papers and patents by performing a thorough search using Web of Science and Patstat/Espacenet databases for papers and patents, respectively. Based on a total of 49 papers and 115 patent families reported...     

Extracellular vesicles from oviductal and uterine fluids supplementation in sequential in vitro culture improves bovine embryo qualityOA

Background: In vitro production of bovine embryos is a well-established technology, but the in vitro culture(IVC)system still warrants improvements, especially regarding embryo quality. This study aimed to evaluate the effect of extracellular vesicles(EVs) isolated from oviductal(OF) and uterine fluid(UF) in sequential IVC on the development and quality of bovine embryos. Zygotes were cultured in SOF supplemented with either BSA or EVs-depleted fetal calf serum(dFCS) in the presence(BSA-EV and d...     

Saxicolous lichen communities in three basins associated with mining activity in northwestern Argentina

Mining activity affects the vegetation and soils of the ecosystems. However, the effects of mining activity on saxicolous lichen communities are less concerned. Thus, the aim of this study was to characterize saxicolous lichen communities in three basins(Vis-Vis River basin, Poteros River basin, and Capillitas River basin) surrounding metalliferous mining projects of different types of operation and at different stages of exploitation. A large-scale mine(Bajo de la Alumbrera) with more than 25 a...     

猪圆环病毒3型近五年的研究进展

猪圆环病毒3型(porcine circovirus type 3,PCV3)属于圆环病毒科，是一种无包膜、环状、单链DNA病毒。猪圆环病毒属成员最初于2016年被报道，能够感染猪，其结构特征、临床症状、发病机制和猪感染后的免疫反应在之后的研究中得到了进一步的阐述。本综述旨在总结PCV3相关研究在病毒基因组特征、流行病学、发病机制、免疫应答和诊断方法方面的进展。PCV3在全球各年龄段的猪上均有检出，并与一系列临床症状相关，包括多系统炎症综合征、繁殖障碍、猪皮炎与肾病综合征以及亚临床感染。实验性研究发现猪感染PCV3后成功地再现了多系统炎症，但并未暴发临床疾病。这些发现，再加上大量关于PCV3并发感染的报道，表明仅感染PCV3可能不足以导致猪出现明显的临床疾病。目前尚未充分阐明PCV3的发病机制，也未能确定促进病毒入侵细胞的受体，但已证实PCV3可在受感染猪的滋养层细胞、心肌细胞、皮肤脂肪细胞和神经元等多种类型的细胞中复制。PCV3似乎可以逃避宿主的免疫反应，在实验性和田间研究中，猪感染病毒42 d后会出现持续性毒血症就证明了这一现象，不过感染猪有强烈的体液反应。已经观察到宿主细胞因子谱...     

机采棉提质增效关键栽培技术

本文在生产实践基础上,提出机采棉生产过程中影响机采棉品质和效益的关键问题,总结了与机采棉提质增效相配套的关键栽培管理技术措施,为进一步提升机采棉品质和效益提供技术指导.     

Tree ecophysiology in the context of climate change

Forest structure and function strongly depend on and concurrently influence environmental conditions.Tree performance is generally governed by its genetics and environment;thus,recent hotspots in this field include tree genotype × environment,phenotype × environment,and functional trait × environment interactions.The editorial,review,and 22 original research articles in this Special Issue, "Tree ecophysiology in the context of climate change",highlight ecophysiological phenomena(e.g.,climate hor...     

不同有机物料腐熟剂对农业废弃物堆肥腐熟效率的影响

为提高农业废弃物资源化利用效率,选择6种不同有机物料腐熟剂进行牛粪和棉花秸秆的堆肥试验,监测堆肥温度、pH值、碳氮比、含水量、种子发芽指数等指标.结果表明:添加有机物料腐熟剂后,堆肥沤制初期升温快,堆肥沤制后期腐熟效率高;添加有机物料腐熟剂能缩短堆肥腐熟周期;根据试验结果和使用成本判断6种有机物料腐熟剂性价比,以四川绿微公司生产的有机肥发酵剂和鹤壁人元生物公司生产的促腐剂应用于牛粪和秸秆堆肥发酵效果较好.     

基于SSR标记的胡麻粗脂肪及脂肪酸组分的关联分析

为了深入了解胡麻种质粗脂肪及脂肪酸组分的遗传变异,以230份胡麻种质为研究对象,利用广义线性模型（GLM）进行关联分析,结果表明,粗脂肪和5种脂肪酸含量的变异系数为7.39%~22.67%,遗传多样性指数为2.66~2.80;粗脂肪和亚麻酸含量的相关系数（0.669）最大;筛选出了30对SSR引物,共扩增出365个条带,有效等位基因数在1.2168~1.8320,引物多态性含量为0.2489~0.6257;在群体结构K=4时,230份胡麻资源可分为4个类群;5种脂肪酸显著关联的SSR位点22个,粗脂肪含量相关的SSR位点4个,说明230份胡麻种质的遗传多样性丰富,5种脂肪酸和粗脂肪含量与SSR标记显著关联。     

The interplay between leaf water potential and osmotic adjustment on photosynthetic and growth parameters of tropical dry forest trees

Mimosa tenuiflora and Piptadenia stipulacea are commonly accepted as drought-tolerant species but little is known about their response to drought followed by rehydration.Therefore,the interplay between leaf water potential and osmotic adjustment on photo synthetic and growth parameters of these species was examined.A greenhouse study was conducted in a split-plot design with two water conditions in the main plots(control;drought followed by rehydration),and eight sampling times in the subplots(1...