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1.
以高异交率三系不育系T98A和粤泰A为材料,研究了不同"九二○"喷施方法对其原种繁殖产量和纯度的影响。结果表明,不喷施"九二○"或推迟"九二○"喷施时间虽然降低了繁殖产量,但可以提高原种纯度,有利于生产高纯度的不育系种子。  相似文献   

2.
不同生长调节剂对粳稻三系不育系10A开花习性的影响   总被引:1,自引:1,他引:0  
研究了"九二○"、花信灵、云大120、0.9%爱多收、尿素对杂交粳稻不育系10A抽穗期、开花期以及柱头活力的影响。结果表明:在幼穗分化Ⅵ期末喷施"九二○"30g/hm2可以使不育系提前3d左右抽穗,并且开花率显著高于对照;在幼穗分化Ⅵ期末喷施花信灵也能显著提高开花率;始穗期喷施高剂量"九二○"(150g/hm2)、幼穗分化Ⅵ期末喷施云大120或花信灵均能延长10A的柱头活力;始穗期喷施高剂量"九二○"(150g/hm2)或爱多收能显著提高10A开花当天的结实率;穗分化Ⅳ期末施用尿素并在始穗期喷施高剂量"九二○"(150g/hm2)能够使10A的单穗及每日开花高峰前移。  相似文献   

3.
两系不育系培矮64S对"九二○"反应迟钝.根据两优培九多年制种实践,提出了以培矮64S为母本的两系组合制种中"九二○"的喷施时期、用量、次数和浓度等高效使用技术.  相似文献   

4.
"九二○"浓度对水稻不育系制种性状的效应研究   总被引:1,自引:0,他引:1  
对几个不育系的制种特性及喷施不同浓度“九二○”的制种效果进行了分析,结果表明,不育系的异交结实率、裂颖率、柱头外露率和千粒重等各性状的相关均为不显著水平;喷施不同浓度的“九二○”对各不育系的异交结实率、裂颖率、柱头外露率、包颈粒率和千粒重等特性均产生一定的影响,其中以“九二○”用量10g/666.7m2为宜,各不育系的性状间略有差异。  相似文献   

5.
广优772是福建禾丰种业有限公司、福建省农业科学院水稻研究所、三明市农业科学院利用广抗13A与福恢772配组育成的三系中籼杂交水稻品种,2015年通过福建省农作物品种审定。通过设置"九二○"在不同抽穗时期喷施不同施用量的试验,研究"九二○"对广优772制种母本株高、穗颈、包颈粒率、结实率和制种产量的影响,结果表明广优772获得制种较高产量的"九二○"喷施最佳时期为母本抽穗15%~20%,喷施量为300~375g/hm~2。  相似文献   

6.
采取喷施"九二○"和不喷"九二○"2种处理,调查比较了印水型优质不育系中100A的开花习性。结果表明,未喷"九二○"情况下,中100A单株抽穗开花期11 d,盛花期在见穗后的第3~5天,单穗抽穗开花期7~8 d,晴天开花高峰时段为09:01—10:00和11:01—13:00,午前花率47.34%;喷施"九二○"后单株花期缩短3 d,开花期和盛花期均提早1 d,晴天开花高峰时间提前1 h,午前花率提高约27个百分点,柱头外露率提高8个百分点。  相似文献   

7.
杂交早稻金优463高产制种技术   总被引:1,自引:0,他引:1  
彭庆华 《杂交水稻》2005,20(1):36-37
介绍了杂交早稻金优463亲本的主要特征特性,总结了合理安排播差期,创造高产群体结构,加强大田肥水病虫管理,科学喷施"九二○"等主要技术措施.  相似文献   

8.
广抗13A是三明市农科所选育成的广谱抗稻瘟病籼型水稻三系不育系,于2003年10月通过福建省科技厅科技成果鉴定。具有不育度高,育性稳定,广谱抗性较好的特点,且耐肥性强,主穗与分蘖穗差异较大,稻穗的颈部对"九二○"反应较钝感。根据对其不同的喷施时期与不同用量进行效果试验表明:广抗13A对"九二○"喷施时期以田间抽穗率10%~15﹪,喷施用量以20~30g/667m2为宜。  相似文献   

9.
根据京福1优150(京福1A/闽早恢150)父母本的特征特性,总结了合理安排播差期、创造高产群体结构、加强大田管理、科学喷施"九二○"等主要制种技术措施.  相似文献   

10.
王书忠 《杂交水稻》2004,19(4):22-24
根据汕优46在福建邵武的制种实践,从花期安排、播差期确定、培育壮秧、大田肥水管理、花期预测与调节、"九二○"喷施及除杂保纯等方面详细地介绍了其高产制种技术措施.  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.
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   

13.
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   

14.
15.
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   

16.
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.
通过对防治水稻潜叶蝇不同药剂、不同用量的田间对比试验,结果表明,32 g/kg的35%丁硫克百威拌种预防潜叶蝇效果最好,药效可达55 d以上,适宜在生产上推广应用。  相似文献   

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.
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   

20.
为了探讨龙眼(Dimocarpus longan Lour.)种质果实性状的稳定性,连续3a对40份不同基因型龙眼种质果实数量性状的年际间表现进行测定比较。结果表明,在气候条件差异较大的不同年份,单果重、果皮重、果肉重、种子重、果皮厚、可食率、可溶性固形含量等果实性状均表现丰富的多样性,并存在年际间的显著或极显著水平差异,气候条件对果实数量性状有显著影响;不同性状的稳定性有差异,其中可食率的稳定性最高,其次是可溶性固形物含量。通过聚类分析,可将40份龙眼种质按果实性状稳定性分成7类。  相似文献   

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