Cultivar Selection and Test Site Evaluation of Cotton Regional Trials in Jiangsu Province Based on GGE Biplot     

JianLI NaiyinXU 《农业科学与技术》2014,(8):1277-1280

[Objective] This study was to evaluate the high yielding and stability of candidate cultivars, depict the adaptive planting region, analyze trial location discrimination ability and representativeness, as well as identify the ideal cultivar and trial location, with the aim to provide theory background for cultivar selection and reasonable scheme of test location in Jiangsu Province. [Method] The GGE biplot method was used to analyze the lint cotton yield of 12 experimental genotypes in the 6 test locations(three replicates in each) of the cotton regional trial in Jiangsu Province in 2013. [Result] The effects of genotype(G), environment(E), and genotype by environment interaction(G×E) on lint cotton yield were all highly significant(P0.01), which made it necessary to further explore the specific pattern of genotype by environment interaction. Jinmian118(G4) and SF3303(G5) were the best ideal genotypes screened by the "ideal cultivar" and "ideal location" view of GGE biplot, and the ordination of test sites based on the ideal index were in the order of Dafeng(DF), Yanliang(YL), Liuhe(LH), Dongtai(DT), Yancheng(YC), and Nantong(NT), among which NT was relatively weak in representing of the whole target cotton planting region in Jiangsu Province. The "similarity among locations" view of GGE biplot clustered all trial locations into one group, showing that the test sites in the cotton planting region in Jiangsu Province were in the same mega-environment.The "which-won-where" view of GGE biplot indicated that cotton cultivar Jinmian118(G4) was the most appropriate cultivar in the homogeneous cotton planting region in Jiangsu Province. [Conclusion] Among the candidate cultivars, Jinmian118 and SF3303 were identified as the most ideal cultivars in this set of conventional cotton regional trial in Jiangsu Province; the test site of Dafeng ranked the first out of all locations in terms of discrimination and representativeness, and all test locations were clustered into the same mega-environmet, which indicated the high efficiency of cultivar selection in the cotton regional trial in Jiangsu Province.  相似文献   

The Application of GGE Biplot Analysis for Evaluating Test Locations and Mega-Environment Investigation of Cotton Regional Trials   总被引：1，自引：0，他引：1  

XU Nai-yin  ;Fok Michel  ;ZHANG Guo-wei  ;LI Jian  ;ZHOU Zhi-guo 《中国农业科学(英文版)》2014,(9):1921-1933

In the process to the marketing of cultivars, identification of superior test locations within multi-environment variety trial schemes is of critical relevance. It is relevant to breeding organizations as well as to governmental organizations in charge of cultivar registration. Where competition among breeding companies exists, effective and fair multi-environment variety trials are of utmost importance to motivate investment in breeding. The objective of this study was to use genotype main effect plus genotype by environment interaction（GGE） biplot analysis to evaluate test locations in terms of discrimination ability, representativeness and desirability, and to investigate the presence of multiple mega-environments in cotton production in the Yangtze River Valley（YaRV）, China. Four traits（cotton lint yield, fiber length, lint breaking tenacity, micronaire） and two composite selection indices were considered. It was found that the assumption of a single mega-environment in the YaRV for cotton production does not hold. The YaRV consists of three cotton mega-environments： a main one represented by 11 locations and two minor ones represented by two test locations each. This demands that the strategy of cotton variety registration or recommendation must be adjusted. GGE biplot analysis has also led to the identification of test location superior for cotton variety evaluation. Although test location desirable for selecting different traits varied greatly, Jinzhou, Hubei Province, China, was found to be desirable for selecting for all traits considered while Jianyang, Sichuan Province, China, was found to be desirable for none.  相似文献   

影响乳及乳制品中共轭亚油酸含量因素的研究进展     

张中义  魏峰 《中国乳业》2009,(1)

共轭亚油酸(Conjugated Li-noleic Acid,CLA)是亚油酸(Linoleic Acid,LA)衍生物18碳二烯酸位置异构体的总称。自20世纪80年代末发现CLA具有独特的生理活性以来,其诱人的应用前景引起了营养学家、药物药理学家和化学家们的极大兴趣。CLA主要存在于反刍动物  相似文献   

兽医外科手术的操作技术     

范春梅  王志  刘长权  刘红艳 《养殖技术顾问》2009,(4):75-75

1 基本技术 1．1 分离 显露充分,切口位置尽量接近最好直达患部。损伤少,尽量与神经、血管、腺体输出管、肌纤维的走向平行或接近平行进行分离。愈合有利机能好,切口边缘要平整,不造成死腔,保证创液及分泌物的引流畅通,操作简单迅速,尽量缩短手术时间,二次手术时避开疤痕组织切开。  相似文献   

一例幼犬肠梗阻的诊治报告     

王福军  龚都强 《养殖技术顾问》2009,(8):102-103

犬肠梗阻是指犬的肠管发生机械性阻塞,常导致正常生理结构位置发生不可逆的变化,如肠套叠、肠扭转和肠管阻塞等,也可导致肠管不通和局部血液循环发生障碍,甚至发生肠管坏死。临床上肠梗阻的发生常见于吞噬异物、便秘、寄生虫大量聚集等造成肠管阻塞,表现为顽固性呕吐、腹痛、排粪便量减少或无便,是危害犬生命的重要疾病。  相似文献   

金塔绿洲近20年来农业生态安全动态评价与对策研究   总被引：2，自引：0，他引：2  

马亚兰  刘普幸  王枫叶 《土壤》2010,42(2):184-189

根据世界经济合作和开发组织(OECD)与联合国环境规划署(UN-EP)共同提出的环境指标P-S-R(压力-状态-响应)概念模型,从金塔绿洲农业生态环境压力、生态环境状态和生态环境响应3方面构建了一个4层次的绿洲农业生态安全评价指标体系。在此基础上,利用多层次多目标决策和模糊优选理论,建立金塔绿洲农业生态安全评价的模糊优选模型。最后,对其1988—2007年农业生态安全进行动态评价。结果表明:20年来,金塔绿洲农业生态安全决策优属度小,生态安全总体水平低,生态环境不断恶化,生态安全形势严峻,正变得不利于人类的生存和发展,为此,提出保护绿洲生态环境,促进绿洲农业可持续发展的建议和对策。  相似文献   

日光温室前屋面覆盖物协调铺卷装置设计与试验     

张国祥  张璐  李鑫星  龚志文  董玉红  马云飞 《农业机械学报》2023,54(5):348-358

前屋面是实现日光温室内外环境沟通的重要构建部分,通过控制前屋面覆盖物状态即可达到控制日光温室内部环境的目的。保温卷帘、通风卷膜以及遮阳网布作为日光温室常见的3种主要覆盖功能材料,在依靠共同前屋面构造面实现铺卷动作时,存在作业机械结构难以协调、自动化程度低等问题。结合3种覆盖物铺卷的功能需求,设计其彼此相协调的铺卷装置,包括外侧铺卷结构和内侧铺卷结构两个主要部分以及相配套的覆盖物协调铺卷控制方法。通过比例缩放的实体模型和实地试验相结合的方法验证了所设计日光温室前屋面覆盖物协调铺卷装置可以有效实现卷帘、卷膜和遮阳网布3种覆盖物的协调铺卷,且具有较好的控制精度和稳定性。模型试验结果表明：覆盖物开度控制的平均相对误差均小于3.5%,均方根误差均小于2.0%。覆盖物铺卷控制在各个开度下的变异系数均小于3.0%。而卷帘铺卷控制装置在实地试验中,其开度控制试验结果的平均相对误差均小于2.5%,均方根误差小于1.26%,测试数据的变异系数小于1.0%,也表现出较好的作业控制精度和稳定性。实地试验和模型试验结果中的测量数据整体变化趋势相同,进一步验证了装置模型试验结果的合理性和整体装置的实施可行性。  相似文献   

云南切梢小蠹蛀食云南松枝梢行为研究     

高艳飞  张英  张真  吴伟 《西北林学院学报》2012,27(3):97-100

云南切梢小蠹(Tomicus yunnanensis)通过蛀梢危害与蛀干危害共同致死云南松(Pinusyunnanensis)。通过野外自然调查,对云南切梢小蠹蛀食枝梢影响因素进行了探讨。结果表明,云南切梢小蠹蛀梢坑道长度与枝梢长度和蛀梢直径呈显著相关,且云南切梢小蠹侵入枝梢的部位也很大程度上决定了蛀梢坑道的长度,二者显著相关。研究发现,影响云南切梢小蠹蛀梢坑道长度的主要因素为:枝梢长度,枝梢直径,侵入孔位置。  相似文献   

科技论文常见标点符号误用例析（四）：连接号     

李在蓉 《油气储运》2012,(7):513-513

GB/T 15834-1995《标点符号用法》规定＂：连接号的形式为‘-’,占一个字的位置。连接号还有另外三种形式,即长横‘——’（占两个字的位置）、半字线‘-’（占半个字的位置）、和浪线‘～’（占一个字的位置）。  相似文献   

不同蜜蜂授粉方式对立架厚皮甜瓜授粉效果的影响     

张伯虎  朱雪荣  问亚军  张永民  王楠  李武成  姚怀亮 《黑龙江农业科学》2022,(3):60-63

为研究推广立架厚皮甜瓜蜜粉授粉技术,降低瓜农的劳动强度和成本,本研究设计了6种不同蜜蜂授粉方式,调查其对厚皮甜瓜的授粉效果.结果表明:蜂箱放置在棚内的授粉坐果率显著高于蜂箱放置在棚外,白糖水或蜜蜂活动增强剂保丽蕊不能有效吸引蜜蜂进棚授粉,每667 m2的棚内放置3脾蜜蜂效果最好;蜜蜂授粉的单瓜重、纵横径与人工氯吡脲授粉...  相似文献