The Effectiveness of HA-GGE Biplot Application in Analyzing the Data from the National Cotton Cultivar Regional Trial in the Yangtze River Valley

A large number of regional crop trials have demonstrated the ubiquitous existence of genotype × environment interactions (G×E), which make it complicated to select superior cultivars and identify the ideal testing sites. The GGE (genotype main effect plus genotype × environment interaction) biplot is the most powerful statistical and graphical displaying tool available for regional crop trial dataset analysis. The objective of the present study was to demonstrate the effectiveness of the biplot in evaluating the high and stable yields of candidate cultivars simultaneously, and in delineating the most adaptive planting region, analyzing trial location discrimination ability and representativeness, and identifying the ideal cultivar and trial locations. The lint cotton yield dataset with nine experimental genotypes and 17 test locations (three replicates in each) was collected from the national cotton regional trial in the Yangtze River Valley (YaRV) in 2012. The results showed that: (1) the effects of genotype (G), environment (E), and genotype × environment interaction (G×E) were significant (P < 0.01) for lint cotton yield. Differences among environments accounted for 78.7% of the treatment total variation in the sum of squares, whereas the genotype main effect accounted for 8.7%, and the genotype × environment interaction accounted for 12.6%. (2) The “ideal cultivar” and “ideal location” view of the HA-GGE biplot identified Zhongcj408 (G2) and Nannon12 (G9) as the best ideal genotypes; Cixi in Zhejiang Province and Jiangling in Hubei Province were the most ideal locations.(3) The “which-won-where” view of the biplot outlined the adaptive planting region for each experimental cultivar. (4) The “similarity among locations” view clustered the trial locations into four groups, among of which the two outlier locations, Shehong (SH) and Chengdu (QBJ), located in Shichuan Basin in the upper reaches of YaRV, were clustered in one group, whereas the Nanyang (NY) of Henan Province at the northern edge of YaRV was singled out as a sole group. Such location clustering results implied an apparent association with the geographical environment.     

安徽省水稻区试品种稻瘟病和白叶枯病抗性分析

旨在明确2017-2020年安徽省参试水稻品种对稻瘟病和白叶枯病的抗性情况.用人工喷雾接种和自然诱发相结合的方法测得品种对稻瘟病的抗性,用剪叶接菌方法测得品种对白叶枯病的抗性.结果 表明:659个水稻品种中,48.10％表现为中感稻瘟病,其次为中抗、感、高感,表现为抗病的品种仅占1.06％,没有高抗品种.51.59％表...     

中国各地区“以工补农”的经济结构特征 分析与政策建议

当前中国总体上已进入工业化中期阶段,但由于地区发展不平衡,各地区不可能都进入工业化中期阶段,统一的“以工补农”政策模式和措施在各个地区也不一定都适用。作者采用美国经济学家钱纳里与赛尔昆设计的标准模型,构建了当前全国及各地区“以工补农”的经济结构特征评价指标,对中国各地区当前的经济结构特征作了初步的分析,得出了在中国总体上跨入工业化中期阶段的事实中,有8个省与中国总体进入工业化中期阶段的判断一致;仍有17个省、区、市尚未进入“以工补农”政策转折期;有6个省市明显超越全国平均水平,已基本进入大规模反哺期的结论,并提出了相应的政策建议。     

广东主要茶区春季杂草群落调查与区域差异分析

探明广东茶园春季杂草基本情况,为茶园杂草防控提供基础数据.2020年3-5月,在广东省粤东、粤西、粤北3个茶叶主产区31个茶园共620块样方开展茶园杂草群落调查,采用七级目测法,记录样方杂草种类及生长优势等级.调查共发现杂草313种,出现频度高于10％的杂草有126种,其中菊科杂草23种、禾本科12种、茜草科8种、蔷薇...     

Description of a novel ultrasound-guided approach for a dorsal quadratus lumborum block: a canine cadaver study

ObjectiveTo describe an ultrasound-guided approach to the dorsal aspect of the quadratus lumborum muscle (D-QL) and to evaluate the spread of methylene blue dye in canine cadavers.Study designProspective, experimental anatomical study.AnimalsA total of 12 canine cadavers.MethodsThe ultrasonographic landmarks and injection technique for the D-QL approach were determined in two cadavers. Correct needle tip position was confirmed by computed tomography. Bilateral ultrasound-guided injections were performed in 10 cadavers between the QL muscle, the vertebral body and the ventrocaudal aspect of the transverse process of the first lumbar vertebra (L1) using two volumes of methylene blue: low volume (LV) 0.3 mL kg^–1 or high volume (HV) 0.5 mL kg^–1. Staining of the main thoracolumbar trunk, dorsal and ventral branches of the thoracic (T) and lumbar (L) spinal nerves, sympathetic trunk and epidural space were assessed following dissection. Data between groups were compared using Mann–Whitney U test. Data are presented as median (range).ResultsThe ventral branches of spinal nerves T12, T13, L1, L2, L3 and L4 were stained in 10%, 70%, 100%, 90%, 60%, 0% and 30%, 100%, 100%, 100%, 50% and 30% after LV and HV injections, respectively. Multisegmental spread of the sympathetic trunk was found on 3 (3–4) and 5 (3–6) vertebral spinal levels following LV and HV injections, respectively (p = 0.005). The T13 segment of the sympathetic trunk was stained after all HV injections. Epidural spread was found in 20% and 30% of LV and HV injections, respectively.Conclusions and clinical relevanceThe injection of HV versus LV dye using the D-QL approach provided more consistent staining of the thoracolumbar nerve structures which innervate the abdominal wall and viscera. Clinical studies are required to evaluate the analgesic efficacy of the D-QL block for abdominal procedures in dogs in vivo.     

具有地域特色的滨海道路景观设计——以青岛崂山大道为例

地域特色可以通过自然景观和文化景观2方面来体现。文中从青岛市崂山路滨海景观设计案例入手,讨论了滨海景观设计如何突出地域特色的问题;通过挖掘基地的自然和文化景观资源,从自然景观和文化景观营建2个方面探讨了崂山滨海景观大道的地域特色营建手法。文化景观主要突出道家文化主题,在设计手法和设计细节处体现文化要素;自然景观突出山、海自然环境特色,利用现状自然特征处理滨海与山体景观界面,最终实现凸显地域特色的滨海景观长廊的设计目标。     

集体林区阔叶化改造实施组织模式的探讨

为了将集体林生态退化区域阔叶化改造的责任主体落实到农户,解决集体林区阔叶化实施难的问题。本文针对集体林区特点,建立县、乡（镇）、村三级联动组织实施体系,并以稳定的山林经营权为依据,分别探讨了村集体统一实施、农民家庭实施、村户合作实施、招标承包实施和国有林场实施五种模式的具体做法,将农民的愿望与国家生态建设的要求统一起来,推动了集体林区阔叶化进程。     

基于地域性的城市公园设计

文中从如何将地域性景观切入到公园的设计入手,通过相关理论研究得出地域性景观的主要组成要素,通过对相关案例分析提出基于地域性的公园景观的规划布局要点及设计手法。       

地域文化视角下绿道公共空间品质提升策略——以北京北中轴体育文化城为例

绿道作为城市公共空间之一,与居民的日常生活息息相关。由于我国城市建设速度不断加快,城市公共空间的品质难以得到保障。因此,本文以北京市北中轴体育文化城作为研究对象,从地域文化的视角出发,在城市设计层面提出优化绿道公共空间品质的策略,以期传承地域文化,为人们提供良好的城市公共空间环境。     

中国林产工业集聚水平测度及演进趋势与产业经济增长——基于2003—2016年数据的实证分析

利用产业集聚指数和产业区域集中度测算2003—2016年中国林产工业两位数产业集聚水平,并实证分析林产工业两位数产业集聚与其经济增长的关系。研究表明:1）木材加工业和家具制造业处于中度集聚状态,而造纸与纸制品制造业处于低度集聚状态;2）木材加工业集聚度呈上升趋势,而家具制造业和造纸与纸制品制造业集聚度呈下降趋势;3）中国林产工业主要集聚在经济发达的江苏、广东、山东和浙江等沿海省份,但木材加工业和家具制造业分别在广西和四川有较快增长趋势;4）木材加工业集聚水平与其产业经济增长呈正相关,而家具制造业和造纸与纸制品制造业集聚与其产业经济增长呈负相关。