共查询到20条相似文献,搜索用时 62 毫秒
1.
优质早籼水稻品种主要经济性状的相关与通径分析 总被引:6,自引:0,他引:6
本文研究了优质早籼水稻品种主要经济性状间的相互关系程度及其对产量的通径作用,结果表明,单株粒重与其他8个调查性状间除与千粒重呈负相关外均有不同程度的正相关。其中与每穗粒数,穗长分别达显著或极显著水准。每穗粒数对单株粒重的直接贡献最大,其次是结实率和每株穗数。结实率对产量的作用明显地受到环境的影响。穗长和着粒密度对单株粒重的直接效应为效大的负值,但通过每穗粒数而对产量产生强大的间接正效应。在优质早籼 相似文献
2.
福建秋大豆地方品种主要农艺性状的相关及通径分析 总被引:1,自引:0,他引:1
本研究以100个秋大豆地方品种为材料,对9个主要农艺性状进行相关及通径分析,统计结果表明:福建秋大豆属中,晚熟类型多,株高与分枝中等,籽粒较大,品种间各性状变异大。影响单株产量的主要因素是单侏粒数,全株重,单株荚数和百粒重4个性状,而与植株高度无明显相关,主茎节数与分枝数对单株产是一有定的间接影响作用。 相似文献
3.
4.
黄淮海地区夏大豆农艺性状与产量的多元回归和通径分析 总被引:3,自引:0,他引:3
应用多元统计方法,分析了黄淮海地区73份夏大豆农艺性状与产量之间的关系。结果表明:影响夏大豆产量的主要农艺性状因品种结荚习性的不同而有所差异。在亚有限型大豆品种中,每荚粒数、单株荚数、株高和单株粒重对产量的直接作用较大;在有限型大豆品种中,单株粒数、生育期、茎粗和株高对产量的直接作用较大。在品种选育上,对于亚有限大豆品种,应优先选择单株粒重较高的单株,尤其是注重多荚和多粒性状的选择;对于有限型大豆品种,应选择生育期与单株粒重间平衡较好的单株,能充分发挥高产潜力。 相似文献
5.
对广亲和品种参与下籼粳稻间数量性状相关遗传力进行了剖析,结果表明各性状间的相互作用极为复杂,但在选择强度相同的条件下,单株粒重、单株穗数、穗粒数对结实率的直接作用均较大,穗长、株高、花粉可育率、千粒重对结实率也产生较大的间接效应。 相似文献
6.
秋大豆主要产量性状的遗传相关和通径分析 总被引:1,自引:0,他引:1
利用来自南方六省的7个秋大豆新品种,选用7个产量性状进行了遗传、相关和通径分析。结果表明,秋大豆株高、单株荚数和粒数的遗传变异较丰富;株高、主茎节数、单株荚数和粒数与单株产量有极显著正遗传相关;单株荚数、每荚粒数和百粒重对单株产量表现为较大的正向直接作用,且以单株类数最大,株高、主茎节数、单株粒数主要通过单株荚数的间接正效应影响单株产量。 相似文献
7.
8.
9.
10.
通过对来自中国北部、中部和南部不同纬度地区的114个小豆品种在江苏南京和泰国农业大学的农艺性状进行研究。研究结果表明:与栽培在江苏相比,小豆品种在泰国热带地区表现为株高降低、生育期缩短,百粒重、每荚粒数、和单株产量均有所降低,但分枝数和每荚粒数变化不大。从不同来源的群体来看,来自中国北部的品种的农艺性状在泰国的变异系数大于中部品种,而南部品种引种至泰国后农艺性状的变异系数最小。通过对产量因子的相关分析表明,单株荚数对产量的相关系数最大(0.75)。而其它性状如分枝数(0.30)和每荚粒数(0.21)与产量的相关系数不大,而百粒重(0.07)对产量的相关系数最小。聚类分析的结果表明,以上114个小豆品种可划分为中国北部1、中国北部2、中部、南部4个大类。显示了北部品种之间有较大的遗传差异。 相似文献
11.
针对豫北地区的大豆生产现状,从气候、土壤、品种、生态因素及市场需求等方面提出了优质大豆的发展策略与途径。 相似文献
12.
Irrigation of Netted Gem potatoes was scheduled during three growing seasons by three methods: (a) when plants displayed first visual symptoms of moisture stress, (b) when indicated by a soil moisture budget involving estimated evapotranspiration, and (c) on the basis of tensiometer readings of soil moisture suction. When the tensiometer method of scheduling was used, the mean yields of tubers were 55.0 and 25.8 cwt/acre (6160 and 2890 kg/ha) higher than those obtained with the other two scheduling methods. Methods did not affect the specific gravity of potatoes. Method (a) scheduled irrigations least frequently. Scheduling by the budget method was not always adequate because it was based on the assumption that the crop extracted water from a constant 4 ft (1.2 m) profile from planting to full vegetative growth. In one year the budget method scheduled the first irrigation earlier than necessary and delayed the second irrigation during a critical period of crop growth. From full vegetative cover to harvest the irrigation schedules were alike for both the budget and tensiometer methods. 相似文献
13.
以长沙县高桥相同嫩度茶鲜叶原料采用卷曲形毛尖茶加工工艺制绿茶为对照,分别对沅陵县齐眉翠峰、凤娇碣滩茶、干发茶和军大坪茶4种绿茶的主要生化成分与感官品质进行初步分析。结果表明,沅陵4种绿茶的茶多酚总量28.76%~30.34%,游离氨基酸总量2.35%~3.22%,咖啡碱含量3.00%~3.63%,水浸出物含量37.26%~40.07%,可溶性糖总量5.46%~5.65%,可溶性蛋白含量1.50%~1.74%,类黄酮化合物总量1.16%~1.79%,叶绿素总量1.36%~2.01%,儿茶素总量13.53%~16.20%。与对照相比,4种绿茶的茶多酚、可溶性糖和儿茶素总量均高于对照,除齐眉翠峰外其余3种茶样水浸出物和叶绿素总量均高于对照,除干发茶外其余3种茶样类黄酮化合物总量均高于对照。 相似文献
14.
1 吉林省平安农业科学院大豆研究工作简介吉林省平安农业科学院大豆研究所 ,设在吉林省长春市西安大路种子大厦内。现有科技人员 6人 ,其中研究员 2人 ,农艺师 2人 ,技术员 2人 ,定向培养研究生 2人。大豆研究所的主要任务是选育稳产、高产、优质及抗病虫大豆新品种 ;同时密切 相似文献
15.
16.
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
17.
18.
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
19.
20.
实施茶叶优势区域规划促进川茶产业持续发展 总被引:1,自引:0,他引:1
为了充分发挥四川茶叶的比较优势和自然资源优势,进一步提高川茶产业竞争力和促进农民增收,在四川省委、省政府重视下,在开展特色茶叶产品研究的基础上,制订了<四川省茶叶优势区域规划>,以期通过"规划"的实施,在基地建设、规模化生产、产业化经营等方面取得新的突破,为四川省盆周山区和丘陵地区的农村经济发展和农民增收做出新的更大贡献. 相似文献