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The ability to map profit across a cotton field would enable producers to determine where money is being made or lost on their farms and to implement precise field management practices to facilitate the highest return possible on each portion of a field. Mapping profit requires knowledge of site-specific costs and revenues, including yield and price. Price varies site-specifically because fiber quality varies, so mapping fiber quality is an important component of profit mapping. To map fiber quality, the harvest location of individual cotton bales must be known, and thus a system to track the harvest location of cotton modules must be available. To this end, a wireless module-tracking system was recently developed, but automation of the system is required before it will find practical use on the farm. In Part 1 of this report, research to develop automatic triggering of wireless messages is described. In Part 2, research to enable the system to function with multiple harvesting machines of the same type in the same field - a common situation in commercial cotton farming - is described along with testing of the entire automated wireless module-tracking system. To automate wireless-message triggering, a sensing and control system was added to a harvester to indicate when the machine is dumping a basket load of cotton so that wireless messages can be automatically sent from the harvester to subsequent field machines. This automated system was incorporated into the existing wireless module-tracking system, field tested, and it ultimately operated as designed, without human intervention. Linking data collected with this system together with cotton classing data enabled the creation of fiber-quality maps. 相似文献
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A system including wireless-communication and GPS technologies was designed, constructed and field tested to enable site-specific
crop management in cotton production in the form of fiber-quality mapping. The system is comprised of three functional sub-systems
associated with the three machines typically used in cotton harvesting: harvester, boll buggy and module builder. Harvest
area for a basket load of cotton is recorded with GPS, and the module into which a basket is dumped is tracked through wireless
communication among the sub-systems. In three field tests, the system was easily installed on equipment and performed as designed.
Fiber-quality maps were produced by combining the GPS-based module area data collected during harvest with bale-level fiber-quality
data measured at a cotton classing office after ginning. Statistical analysis showed significant differences in most cotton
fiber properties among mapped modules, and spatial trends were identified. The system provides a useful tool for studying
spatial variability in cotton fiber quality. 相似文献
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【目的】有效发掘利用海岛棉优异性状基因,拓宽陆地棉栽培种遗传基础。【方法】采用新疆主栽早中熟陆地棉品种新陆中60号为母本,与优质海岛棉品种新海41号为父本杂交,并以新陆中60号为轮回亲本构建出由151个BC1F1单株组成的回交群体,利用SSR分子标记和Join Map4.0软件构建遗传连锁图谱,采用复合区间作图法(CIM)对BC1F2纤维品质性状的进行QTL定位。【结果】构建的遗传连锁图谱包含52个多态性标记、14个连锁群,该图谱总长824 cM,覆盖棉花基因组的18.5%;最长的连锁群为150.3 cM,包含6个标记,最短的为0.3 cM,包含2个标记。检测到1个与纤维上半部平均长度相关的QTL,qFL-Chr14-1,定位在第14号染色体上,解释表型变异8.59%。【结论】筛选的与优质QTL位点相关SSR标记可应用于棉花优质分子标记辅助选择。 相似文献
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Yufeng Ge J. Alex Thomasson Ruixiu Sui Cristine L. Morgan Stephen W. Searcy Calvin B. Parnell 《Precision Agriculture》2008,9(4):181-194
A field study was conducted in 2006 in a dryland cotton field in Texas, USA, to explore the spatial variation of cotton fiber
quality and the loan rate associated with it. A total of 66 cotton samples were hand-harvested, and the fiber quality properties
investigated included the High Volume Instrument measurements of micronaire, length, uniformity, strength, elongation, reflectance
(Rd) and yellowness (+b). Conventional statistics showed a generally low level of variation in fiber quality with coefficients
of variation <10%. Variogram analysis showed that all fiber quality properties were spatially correlated. Contour maps of
individual fiber quality properties were produced from block kriged estimates. Fiber length, uniformity, strength and Rd were
positively correlated, and all of these were negatively correlated with +b. The spatial distribution of most fiber quality
properties was similar to that of soil apparent electrical conductivity, suggesting that water holding capacity could be a
limiting factor for cotton fiber quality. Maps of individual fiber quality properties were combined with the United State
Department of Agriculture—Commodity Credit Corporation Loan Schedule for Upland Cotton to create a loan rate map that is associated
with fiber quality. A loan rate difference of 20 cents kg–1 was observed within the field. This level of difference indicated that fiber quality at the field level can have a large
impact on producers’ revenue. A site-specific management system encompassing both lint yields and fiber quality is strongly
recommended for cotton production. 相似文献
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陆地棉纤维品质相关QTL定位研究 总被引：6，自引：1，他引：5
【目的】以湘杂棉2号和中棉所28两个具有共同亲本的陆地棉强优势杂交种的F2为作图群体,构建覆盖率较高的遗传图谱,发掘稳定的纤维品质相关QTL,为标记辅助选择提供依据。【方法】利用SSR标记和JoinMap3.0软件构建陆地棉连锁图,利用Win QTLCart 2.5的复合区间作图法分别对2群体6个纤维品质相关性状在F2和F2:3中进行QTL定位。【结果】利用包含245个多态位点、全长1 847.81 cM的遗传图谱检测纤维品质QTL。中棉所28群体在多环境平均值的联合分析中检测到22个QTL,三环境分离分析中检测到39个QTL;湘杂棉2号群体分别检测到18个和51个QTL。在A3、D2、D9等染色体上有QTL成簇分布现象,并在2个群体中发现一些不受环境影响,稳定遗传的QTL。纤维长度、纤维强度、麦克隆值和伸长率4个性状在2个群体中发现有8对共同QTL。【结论】这些稳定遗传的QTL可以用于分子标记辅助纤维品质改良的育种选择。 相似文献
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《Computers and Electronics in Agriculture》2009,68(1-2):71-79
Our research has shown that cotton insect pests, specifically tarnished plant bugs, Lygus lineolaris (Palisot de Beauvois) (Heteroptera: Miridae) can be controlled early season in commercial cotton fields in Mississippi, USA, using spatially variable insecticide applications. Technology was developed for using GIS-based map scouting and a technique called the line-intercept method for obtaining low-level insect population counts in both rapidly growing areas of cotton and poorer growing areas. Using these population characteristics in combination with heuristic knowledge of the cotton fields and with the GIS maps, a spatially sensitive map could then be developed that could drive a spatially variable insecticide application for the control of the insect pest. We outline the steps needed to develop an automated technology for overcoming the time-sensitive events for early season control of cotton pests. This technology not only includes software systems for processing multispectral images to spatially variable insecticide application maps for spray controllers in the field but also high-speed wireless local area network (WLAN) technology for automated delivery of these controller application maps and for acquisition of as-applied and harvest maps from the field. 相似文献
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采棉机产量监测系统采集数据的误差分析 总被引：1，自引：0，他引：1
为了获取农田作物产量信息，建立产量分布图，在消化、吸收美国AgLeader公司棉花产量监测系统PF3000的基础上，进行了棉花测产收获试验。在收获过程中，对流量传感器、速度传感器等进行了标定，并对产量数据进行了处理。试验结果表明，现场标定可有效提高测产系统流量传感器和速度传感器的测量精度，但田问环境比较复杂，产量数据采集过程中仍会引入一些误差，需对产量数据进行误差处理。误差处理后得到的棉花产量分布图聚类性增强，较为符合实际情况。 相似文献
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我国棉花纤维品质存在的问题及解决途径 总被引：3，自引：0，他引：3
根据棉纺织工业发展对原棉品质的多层次要求,指出我国棉花品种品质不足主要是纤维长度类型单一、强度偏小、麦克隆值稍大,还有栽培、加工等方面的影响。提出以加强纤维品质为核心的新品种选育,改进栽培措施等解决途径。 相似文献
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以2001—2005年农业部对13个主产棉省主栽品种抽查样品的测试结果为研究对象,分析研究了“十五”期间中国棉花纤维的长度、整齐度、比强度、马克隆值等8项品质指标的分布情况,并运用STATA统计分析系统分析了各品质指标之间的关系。“十五”期间,中国生产领域的棉花纤维长度主要分布在28～29mm,整齐度指数主要分布在82%～84%,断裂比强度主要分布在27～29cN.tex-1,马克隆值主要分布在4.0～5.0,可以满足纺织工业纺中、低档棉纱的要求。各纤维品质指标在年度间有波动。按生态区划分,长江流域棉区棉花纤维在长度、整齐度、比强度等指标上优于黄河流域棉区和西北内陆棉区,但马克隆值偏高,色泽特征差,品级较低。黄河流域棉区的棉花纤维在长度、整齐度、比强度、马克隆值、色泽特征等方面处于其它两个棉区之间。西北内陆棉区的马克隆值和色泽特征最好,品级较高。统计分析表明,长度与比强度之间的相关系数r=0.7156,呈高度正相关;整齐度指数与比强度之间的相关系数r=0.5300,呈中度正相关;纺纱均匀性指数与长度、整齐度、比强度均呈高度正相关。与国际乌斯特公报进行比较,中国“十五”期间棉花纤维综合品质达到国际中等质量水平。 相似文献
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为消除遗传背景的干扰,深入剖析陆地棉遗传背景下渗入的海岛棉Chromsome7（Chr．7）片段对优异纤维性状的遗传贡献,本研究从（鲁棉研22×鲁原343）重组自交系中选择携带海岛棉Chr．7染色体片段的优质次级渐渗系R472作亲本,与高产亲本鲁棉研22回交,构建了包含514个F2单株的次级定位群体。利用JoinMap构建Chr．7的遗传图谱,运用基于混合线性模型的QTLNetwork-2．2软件和基于多元回归模型的Windows QTL Cartographer 2．5软件对纤维品质性状进行QTL定位,结果显示,利用WindowsQTLCar-tographer2．5检测到1个纤维强力QTL（qFS—C7-1）,距离渐渗位点DC401828．1cM,可解释表型变异率5．66％,增效等位基因来源于携带有海岛棉Chr．7染色体渐渗片段的R472;利用QTLNetwork-2．2检测到1个纤维强力QTL（qFS—C7-1）、1个纤维细度QTL（qFM—C7-1）。2个作图软件定位的纤维强力QTL位点基本一致,可认为是同一位点。 相似文献
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通过对4个品系在同一地块连续3 a的试验,研究了不同年份间中长绒棉纤维品质的变化.结果表明:不同种植年度的气象差异对中长绒棉纤维品质的影响程度为伸长率＞麦克隆值＞比强度＞长度＞整齐度;遗传差异对麦克隆值和伸长率影响最大,比强度和长度次之,整齐度最小;气象差异对伸长率的影响大于遗传差异,遗传差异对麦克隆值的影响大于气象差异. 相似文献
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利用F2及其衍生群体定位陆地棉产量和纤维品质性状QTLs 总被引：3，自引：0，他引：3
以陆地棉(Gossypiumhirsutum L.)丰产品种中棉所35和优质品种渝棉1号杂交产生的F2群体为材料,利用SSR标记构建了包含46个连锁群和303个位点的连锁图谱.该图覆盖2 543.6 c M,约占四倍体棉花基因组的57.2%,标记间平均距离为8.4 c M.应用MQM作图法分析F2及其衍生群体家系的产量和纤维品质性状,共得到25个产量和23个纤维品质性状QTLs,其中1个QTL(qFS07-1)在3个环境下检测到,2个QTLs(qFS20-1和qFS21-1)在2个环境下检测到.在检测到的QTLs中,22个分布在A亚组,26个分布在D亚组. 相似文献
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多元统计分析棉花品质性状的研究 总被引：2，自引：1，他引：1
[目的]探讨棉花纤维品质的基本动态与总体特征。[方法]以黄河流域区试的17个杂交春棉品种为材料,对其纤维品质性状进行相关分析、主成分分析、聚类分析与多元方差分析。[结果]各项纤维品质性状的变异系数从大到小依次为:麦克隆值>黄度>纺纱指数>比强度>纤维长度>反射率>伸长率>整齐度。前3个主成分方差累积贡献率达90.84%,第1主成分、第2主成分、第3主成分的方差贡献率分别为49.10%、25.36%和16.38%,依次为纤维品质综合因子、伸长率因子和整齐度因子。按纤维品质的相似度,聚类分析将17个杂交春棉品种划分为4大类。[结论]第Ⅰ类为优质棉品种,第Ⅱ类为亚优质棉品种,第Ⅲ、Ⅳ2类为中质棉品种。 相似文献
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对湖北省“九五”以来育成的16个棉花品种的纤维品质进行分析,结果表明:湖北省棉花纤维长度较好,比强度偏低,马克隆值偏高。湖北省生产的原棉品质居全国中上等水平,纤维色特征相比较差。在分析湖北省三大棉区的纤维品质特征基础上,提出将鄂东、鄂北、江汉平原棉区分别建成中长绒、中短绒和中绒3种类型原棉生产基地。对如何提高湖北省原棉质量,从改良棉花遗传品质、提高生产品质、实施品质区划等方面进行了讨论。 相似文献