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旱区马铃薯新品种筛选试验 总被引：3，自引：0，他引：3
《中国马铃薯》2016,(4)
引进了11个马铃薯新品种,以当地品种‘定薯1号’为对照,对物候期、经济性状、产量及块茎品质进行了评价。各引进品种均较对照增产,其中‘鄂马铃薯5号’、‘宁薯14号’、‘中薯21号’和‘冀张薯8号’产量分别为44 933,39 224,37 501和36 270 kg/hm~2,较对照‘定薯1号’分别增产72.1%、50.3%、43.7%和39.0%,且综合性状表现较好,建议作为主粮化加工薯大面积推广种植;‘鄂马铃薯5号’和‘青薯10号’产量高,淀粉、干物质及粗蛋白含量高,还原糖含量较低,适合全粉加工;其他品种继续评价。 相似文献
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《热带作物学报》2017,(9)
通过对‘长营’橄榄及其芽变品种‘清榄1号’果实发育过程中风味物质含量,包括可溶性固形物、可溶性糖、可滴定酸、单宁、黄酮、多酚的测定,初步探讨橄榄果实风味形成机理。结果表明:(1)供试橄榄果形整齐,品种间糖、酸物质含量变化整体一致,酚类物质差异大。(2)花后50~110 d,橄榄果实体积增大,风味物质积累,其中,‘清榄1号’酚类物质在花后70~90 d出现小幅度降低;(3)花后110~170 d,橄榄果实可溶性固形物与糖含量积累,其他风味物质含量降低。(4)‘长营’花后110 d采收风味较佳,‘清榄1号’花后170 d采收风味佳。研究表明,橄榄果实风味形成与糖酸等物质关系不大,与酚类物质关系密切,花后110 d为研究橄榄风味形成的关键时期。 相似文献
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澳洲坚果不同种质果皮内含物含量的研究 总被引：1，自引：0，他引：1
对28份澳洲坚果种质果皮的粗蛋白、可溶性总糖、单宁以及8种矿质元素(P、K、Ca、Mg、Zn、Cu、Fe、Mn)等内含物的含量进行了测定与研究。结果表明:澳洲坚果果皮内含物含量在不同种质之间变化较大,变异系数在15.75%~48.33%之间,变异幅度以可溶性总糖含量最大、Ca含量最小;除Fe、Cu元素外,其它6种矿质元素之间存在显著的正相关或负相关关系;聚类分析将28份种质分成4个具不同内含物含量特点的类群。 相似文献
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《中国马铃薯》2019,(6)
为测试‘希森6号’作为薯条加工原料品种的农艺特性及块茎加工品质指标,将其与‘夏波蒂’、‘麦肯1号’、‘布尔班克’、‘苏兰1号’4个国外引进专用炸薯条品种进行了比较研究。2017年和2018年,在内蒙古商都马铃薯基地进行田间测试,结果显示,‘希森6号’两年平均产量比‘夏波蒂’等4个引进品种增产27.43%～124.41%,其干物质和还原糖含量符合加工兼用型品种的要求;‘希森6号’总糖苷生物碱含量7.10 mg/kg,低于‘夏波蒂’(15.30 mg/kg),类胡萝卜素含量252.25μg/100g,高于‘夏波蒂’(139.57μg/100g);‘希森6号’薯条加工产品感官评价与当前主要炸条品种‘夏波蒂’无显著差异。研究结果表明,‘希森6号’综合性状优良,产量优势突出,可作为薯条加工的原料品种。 相似文献
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‘冀张薯14号’是张家口市农业科学院以‘3号’为母本,‘金冠’为父本,通过有性杂交经系统选育而成,2013年通过河北省农作物品种审定委员会审定,审定编号:冀审薯2013002号。该品种为晚熟鲜薯食用型品种,薯块淀粉含量13.22%,干物质含量18.68%,粗蛋白含量2.12%,还原糖含量0.34%,维生素C含量17.8 mg/100 g鲜薯。2012年参加河北省马铃薯品种生产试验,产量1 634 kg/667m2,比对照‘克新1号’平均增产16.76%。该品种抗马铃薯PVX、PVY、PVS和PLRV病毒病,抗晚疫病。‘冀张薯14号’适于河北省张家口和承德等地区种植。 相似文献
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[目的]比较3种特早熟温州蜜柑‘稻叶’、‘大浦’、‘大分’外观和内在品质差异,为其上市时间提供参考。[方法]通过纵横径、单果重、可食率、瓣数和果皮叶绿素等外观形态,以及果肉可溶性固形物、可溶性糖、可滴定酸、Vc、类胡萝卜素、总酚、类黄酮等内在品质指标,分析3种特早熟温州蜜柑的内外在品质。[结果]3个品种果皮薄而光滑,呈青绿色,果实形状多为扁圆形,瓣数为9~13瓣,其中,大浦、大分果形较大,稻叶果形偏小。内在品质方面,稻叶和大分的可溶性固形物含量差异较小且高于大浦;稻叶的可溶性糖和类胡萝卜素含量最高,大分次之,大浦含量最低;另外,稻叶的可滴定酸、Vc、总酚含量最高,大分最低,大浦介于两者之间;在糖酸比方面,大分最高,稻叶次之,大浦最低。[结论]大分的内外品质较好,具有较好的市场前景。 相似文献
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‘福眼’和‘东壁’龙眼果实贮藏性与采后品质变化比较 总被引：2，自引：0，他引：2
比较研究了福建省主栽品种‘福眼’和‘东壁’龙眼果实在(8±1)℃、85％相对湿度条件下贮藏的果实贮藏性和品质变化差异.结果表明:与‘福眼’龙眼相比,‘东壁’龙眼果实贮藏性较好,采后贮藏期间的‘东壁’龙眼果实好果率较高,而果实失重率、果皮褐变指数、果肉自溶指数、果肉褐变度较低.采收当天的‘东壁’龙眼果实的果肉可溶性固形物(TSS)、总糖和维生素C含量都高于‘福眼’龙眼.采后贮藏期间,‘东壁’龙眼果实的果肉TSS、可滴定酸、维生素C和总糖含量的变化比‘福眼’龙眼果实少;在同一贮藏时间,‘东壁’龙眼果实的果肉TSS、维生素C和总糖含量都高于‘福眼’龙眼果实.因此认为,‘东壁’龙眼果实的贮藏性较好. 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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以‘福桐’、‘绿桐’2个无性系与10个不同种源的白花泡桐个体为研究对象,采用ISSR分子标记对12份白花泡桐材料的亲缘关系进行研究,并利用DPSv3.01进行聚类分析。结果表明：10条引物共扩增出66条条带,其中有37条多态带,多态性比例为56.1%。根据ISSR聚类分析结果,在遗传距离为0.35时,12份白花泡桐材料可分为5类,第1类为‘福桐’无性系与河南、河北种源个体;第2类为‘绿桐’无性系与湖南、湖北、江苏种源个体;第3类为浙江、广东种源个体;第4类为江西、福建种源个体;第5类为广西种源个体。此结果 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
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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