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大米小麦旱高粱品质与性状研究 总被引：1，自引：1，他引：0
对“大米小麦旱高粱”的生物学性状，产量性状，内在品质和加工性能进行了系统的研究分析，结果表明：该品种植株较矮（１４０ｃｍ左右），株型紧凑，茎秆粗壮，高抗倒伏；穗大粒多，产量高，在同等条件下，平均单产９２４１．５ｋｇ／ｈｍ＾２，比对照品种－本地红高粱单间４３３８．０ｋｇ／ｈｍ＾２增产４９０３．５ｋｇ／ｈｍ＾２，增产率为１１７．１％，籽粒的蛋白质，脂肪，还原糖，非还原糖，淀粉，维生素Ｂ１等指标比对照高 相似文献
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为了评价加拿大西部１９１０－１９８７年间发放的春大麦品种的产量进展以及产量组份和农艺性状对产量所起的作用，１９８９－１９９０年在Ｂｏｔｈａ、ｌａｃｏｍｂｅ、Ｏｌｄｓ三个地点对２０个六棱和二棱栽培品种进行了试验。结果表明，籽粒产量每年增加１２．７－４１．４ｋｇ／ｈｍ＾２，收获指数每年增加０．０８－０．１７％，倒状每年减少０．０１－０．０５％，种子蛋白质含量每年减少０．０１－０．０２ｇ／ｋｇ。１９９０ 相似文献
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杂交水稻产量优势稳中求高的育种策略 总被引：1，自引：1，他引：0
对杂交水稻威优６４和汕优６３十年联合区域试验资料统计分析表明，威优６４作早稻区试产量变６１８０～６９００ｋｇ／ｈｍ＾２，平均６４５６ｋｇ／ｈｍ＾２，变异系数１．１６％；作中稻区试６６４５～７８１５ｋｇ／ｈｍ＾２，变异系数２．０８％，汕优６３作晚稻区试５７５９～６５２５ｋｇ／ｈｍ＾２，平均６２１５ｋｇ／ｈｍ＾２，变异系数１．４３％，中稻区试７７２８～８７５９ｋｇ／ｈｍ＾２平均８３０４ｋｇ／ｈｍ＾２， 相似文献
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坚尼草高级品比试验报告 总被引：5，自引：0，他引：5
经过６ａ中，高级品比试验，结果表明：ＣＩＡＴ６１７２的年干物质产量和年粗蛋白产量均居首位，分别为１６２７８ｋｇ／ｈｍ＾２和１０４５ｋｇ／ｈｍ＾２比对照种分别增产４２％和３４．５％，ＣＩＡＴ６９０１的年干物质和年粗蛋白产量均居第二位，分别为１４７８９ｋｇ／ｈｍ＾２和９８７ｋｇ／ｈｍ＾２，比对照种分别增产２９％和２７％。 相似文献
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东北地区部分玉米杂交种的丰产性,稳定性和适应性 总被引：5，自引：1，他引：4
对东北地区１９９２年玉米杂交种区域试验产量结果做了丰产性，稳定性和适应性分析：龙１４２，哲单１０和长单４２五点平均产量分别为１０５０９．７ｋｇ／ｈｍ＾２，１０６２５．８ｋｇ／ｈｍ＾２和１０５２３．１ｋｇ／ｈｍ＾２，较对照四单８分别增产１２．３％，１３．４％和１２．５％；较对照龙单９增产分别为１４．８％，１６．１％和１５．０％。且稳定性和适应性好于其它品种，可在各参试占地区大面积推广种植。 相似文献
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以７６０３－１０－１２－１作母本，邢４０８１为父本，通过有性杂交，系谱选择法育形成Ｈ花－３花生新品种，该品种综合性状优良，生育期短产稳产。试验荚果、籽仁比对照冀油４号分别增产８．９％和９．１％。示范荚果产量４６０８ｋｇ／ｈｍ＾２，荚果普通形，百查重２４３ｇ 百仁重９７．４ｇ，出米率７３．０％７４．０％；含油量５５．７６％，粗蛋白含理２２．２７％，抗旱性强，抗病性好，适应推广。 相似文献
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超级稻培矮64S／E32百亩高产样方栽培技术示范与研究 总被引：2，自引：1，他引：1
１９９９年在临澧县开展了超级杂交稻培矮６４Ｓ／Ｅ３２的两个百亩高产栽培技术示范与研究，尽管遇到不利的气候影响，仍获得了好的收成。湖堰示范点产量为８３００．５ｋｇ／ｈｍ＾２，新河示范点为９４００．５ｋｇ／ｈｍ＾２，比大面积栽培增产３０．４％－３９．６％。产量结构分析表明，足穗，大惠，总库容量大是培矮６４Ｓ／Ｅ３２高产的重要保障。对其生育期表现、叶面积生长特点，施肥水平进行调查，并讨论了此类特迟熟杂交组合在湖北栽培的适应性。 相似文献
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Sena L.P. VanderJagt D.J. Rivera C. Tsin A.T.C. Muhamadu I. Mahamadou O. Millson M. Pastuszyn A. Glew R.H. 《Plant foods for human nutrition (Dordrecht, Netherlands)》1998,52(1):17-30
In the western Sahel, indigenous plants become important staples when cereal harvests are inadequate to support populations inhabiting that region of Africa. The purpose of this study was to assess the nutrient content of several of these edible wild plants. The leaves of the following seven plant foods were analyzed: Ziziphus mauritiana, Cerathotheca sesamoides, Moringa oleifera, Leptadenia hastata, Hibiscus sabdarifa, Amaranthus viridi, and Adansonia digitata. The fatty acid, vitamin E, carotenoid, selected mineral and amino acid contents of these plant foods were determined. These same analyses were performed on the fruit of the Adansonia digitata. In quantitative and qualitative terms, Amaranthus viridis was found to be an excellent source of protein. Its amino acid composition compared favorably to that of a World Health Organization (WHO) protein standard. It also contained considerable amounts of the two fatty acids that are essential in humans (linoleic and -linolenic) and a number of minerals including iron, magnesium, calcium and zinc. The leaves of Hibiscus sabdarifa contained an appreciable quantity of protein the composition of which was comparable to the WHO standard. The mineral content of the leaves of this plant was also exceptionally high; noteworthy was its high zinc content. H. sabdarifa also contained significant quantities of the two essential fatty acids. Ziziphus mauritiana was an excellent source of the essential fatty acid linoleic acid and several of the metals including iron, calcium, magnesium and zinc. Its content of other essential nutrients, however, was rather low. In general, Adansonia digitata leaves were nutritionally superior to the fruit of the tree; however, the fruit did contain useful quantities of potassium, phosphorus, zinc and -linolenic acid. The Leptadenia hastata leaves were an especially good source of lutein and -carotene. These data should be useful to the people who inhabit the western Sahel in helping them devise healthy diets during times when cereal staples are in short supply. 相似文献
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通过电解质外渗法和匍匐茎恢复试验对‘阳江’狗牙根及其12个通过形态鉴定选出的坪用价值高且花序密度低的诱变后代进行抗寒性鉴定。电解质外渗法结果表明:诱变后代间的抗寒性具有较大差异,其叶片半致死温度(LT50)的变异范围为-7.6～-0.2℃(最低值与最大值相差7.4℃);参试材料抗寒性由强到弱依次为M18>M4>M26>M28> M22>阳江>M29>M31>M10>M37>M16>M1>M25,其中,有5个诱变后代抗寒性优于亲本,分别是M18、M4、M26、M28、M22。匍匐茎恢复实验结果表明:诱变后代M1、M22、M26、M31、M25在0℃和-5℃低温胁迫后的恢复生长率都高于亲本,恢复能力均优于亲本;M10、M37、M28在-5℃低温胁迫下,恢复生长能力低于亲本,抗寒性相对较弱,M16和M4在0℃和-5℃低温胁迫下,恢复生长率都低于亲本,抗寒性明显弱于亲本。综合2种方法鉴定结果显示:诱变后代M1、M25的恢复能力较强;M4、M28的叶片抗寒性较好,青绿期较长;M22、M18、M26的叶片抗寒性和匍匐茎恢复能力均较强;M29,M31的叶片抗寒性和匍匐茎恢复能力与亲本相似;M10、M16、M37的叶片抗寒性和匍匐茎恢复能力均较弱,整体抗寒性较弱。 相似文献
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橡胶树丛枝病病原的抗血清制备与应用 总被引：5，自引：1，他引：4
以感染橡胶树丛枝病病原的长春花为材料,制备得到橡胶丛枝病病原菌抽提液,以抽提液为抗原免疫家兔,制备抗血清,经微量沉淀测定,抗血清效价为１：２０４８。应用橡胶丛枝病抗血清检测橡胶褐皮病,无症苗木检出率达３０％－３７％,可疑的褐皮病树检出率达８５．７％。 相似文献
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R. W. Summers 《Crop Protection》1989,8(6):451-454
One hundred and fifty-six pre-roost gatherings of starlings were observed at 28 sites around a roost in west Norfolk during winter. Pre-roost gatherings occurred more frequently at individual farmyards compared with individual fields, but 82% of the sites where gatherings occurred were on fields. The size of gatherings was greater, the closer to the roost. Birds in pre-roost gatherings on fields of autumn-sown winter wheat spent most of the time feeding and had a diet composed almost exclusively of wheat seeds. Birds in gatherings on grass fields also fed intensively whereas only 31% of birds at farmyards were feeding. The implications that these results have with regard to potential damage to fields of winter wheat and around farmyards are discussed. 相似文献
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为了寻找一种高效的荔枝果实瞬时基因表达方法,本研究以荔枝品种‘新球蜜荔’（Litchi chinensis Sonn. var. ‘Xinqiumili’）为试材,利用农杆菌注射法对荔枝果实组织进行转化,研究了果实发育时期、菌株种类、注射部位、取样时间、菌液浓度等对转化效率的影响。结果表明：选择果肉已完全包裹种子的Ⅱb期果实进行连体注射,在果柄、果皮、种子、果肉分别注入OD600值为2.4的农杆菌菌株GV3101,4 d后取样进行检测,4个组织的GUS染色率较高。本研究成功建立了适用于荔枝果实的基因瞬时表达系统,为今后快速鉴定荔枝果实相关基因功能提供了基础。 相似文献
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2020年10月17日,《中华人民共和国生物安全法》(以下简称《生物安全法》)通过全国人大常委会的审议,自2021年4月15日起施行.生物技术的研究与应用安全是《生物安全法》涉及的主要内容之一,基因编辑作为近几年生物技术领域的研究热点,其安全性评价和监管备受关注.本文概述了基因编辑技术的应用现状,比较了不同国家对基因编... 相似文献
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为深入研究昆虫病原真菌蝉拟青霉疏水蛋白PChyd基因的功能,根据蝉拟青霉基因组信息克隆疏水蛋白PChyd基因,对该基因序列进行生物信息学分析,使用qRT-PCR技术对其在不同培养条件或阶段下的表达模式进行分析,并通过酶切酶连的方法构建了该基因的敲除载体。结果表明：PChyd基因的开放阅读框序列全长303 bp,编码100 aa,包含22 aa的信号肽序列和70 aa疏水蛋白功能区域。系统发育分析显示该基因与粗糙虫草菌亲缘关系最近。qRT-PCR结果显示PChyd基因在PDA培养的菌丝体、诱导的附着胞、诱导的芽生孢子中表达量显著高于另外2个样品,其中芽生孢子表达量最高,暗示该基因在蝉拟青霉侵染初期和在昆虫血腔中定殖阶段可能具有重要作用。凝胶电泳结果表明,成功构建了该基因的敲除载体,扩增出含有上臂、HPH、下臂的3356 bp左右的片段。本研究为进一步探究蝉拟青霉疏水蛋白PChyd基因的致病机理、生防工程菌的改造奠定了基础。 相似文献
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波罗蜜叶片突变体叶绿素含量测定和超微结构观察 总被引：1，自引：0，他引：1
波罗蜜（Artocarpus heterophyllus）是一种热带果树,至今对其突变体的研究少有报道。本研究以波罗蜜叶片为试验材料,探究其叶片出现白化和返绿现象的可能原因。（1）用分光光度计法、比色法测定波罗蜜叶片突变体和正常绿叶的叶绿素及叶绿素前体物质含量;（2）用叶绿素酶Elisa试剂盒测定叶绿素酶活性;（3）用透射电子显微镜对叶绿体的超微形态结构进行观察。研究结果表明：（1）不同叶色所产生的叶绿素a含量、叶绿素b含量、叶绿素总含量、类胡萝卜素含量均存在显著差异;（2）波罗蜜叶片突变体和正常绿叶的叶绿素合成前体物质含量之间并没有出现显著性差异;（3）对波罗蜜叶片的叶绿素酶活性进行测定时,发现其活性出现显著差异,但对其叶绿素含量的差异性并没有产生较大影响;（4）观察波罗蜜叶片内叶绿体超微形态结构时,发现正常绿叶的叶绿体形态完好且数量较多,白化叶和返绿叶的叶绿体内部结构存在缺陷,其原因是叶绿体基粒构建阶段受阻;基于测定波罗蜜叶片中的叶绿素、叶绿素前体物质含量和叶绿素酶活性,并观察波罗蜜叶片内叶绿体的超微形态结构,对得到的数据结果进行比较分析。本研究推测是在叶绿素合成阶段,原脱植基叶绿素合成叶绿素时受阻及叶绿体发不良导致波罗蜜出现白化和返绿现象,为今后进一步综合研究波罗蜜突变体提供理论依据。 相似文献
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Insect pest management is facing the economic and ecological challenge worldwide due to the human and environmental hazards caused by majority of the synthetic pesticide chemicals. Identification of novel effective insecticidal compounds is essential to combat increasing resistance rates. Botanicals containing active insecticidal phytochemicals appear to be promising to address some of these problems. Therefore, there is a continuous need to explore new active molecules with different mechanisms of action. Secondary metabolites present in plants apparently function as defense (toxic), which inhibits reproduction and other processes. The phytochemical biomolecules could be used for maximizing the effectiveness and specificity in future insecticide design with specific or multiple target sites, while ensuring the economic and ecological sustainability. In this article, the current state of knowledge on phytochemical sources and insecticidal activity, their mechanism of action in insects, resistance, and promising advances made in phytochemical research are reviewed. 相似文献