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种子纯度鉴定对杂交水稻增产关系十分密切。本文利用等电点聚焦电泳测同工酶法对光敏核不育杂交水稻Ks—9/直龙进行了种子纯度的鉴定。实验结果表明,早期萌发的ks—9/直龙其胚芽、胚根和胚乳的酯酶同工酶谱有明显的差异。其中,胚芽同工酶的种类和含量最多,能真实地显现出该品种的酶谱特征。ks—9/直龙的酶谱类型属单亲本型,即ks—9/直龙的酯酶同工酶谱与其父本直龙同型。室温下贮藏一年的ks—9/直龙种子在萌发初期,其酶的含量明显下降,且有些酶带消失,但还能体现出该品种的酶谱特征,表明酯酶同工酶较稳定,是种子纯度鉴定的好指标。 相似文献
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酯酶同工酶谱分析鉴定杂交水稻种子纯度技术初探 总被引:9,自引:2,他引:9
本文对长江中下游地区目前常用的水稻杂交种子及其亲本进行了酯酶同工酶电泳测定,通过对不同生长时期材料的选择,以及电泳图谱中标记酶带的分析,将杂交稻的酶话类型归为3种:互补类型、编亲类型、杂合类型,其中的互补酶类型为杂交水稻纯度的鉴定提供了一个可靠的依据。 相似文献
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通过电泳方法分析协优46和协忧63两种杂交水稻间酯酶同工酶差异。采用高温、不同的相对湿度对协优46和协忧63进行处理,并与处理前的种子活力进行比较,以研究影响种子活力的因素。结果表明,协优46和协忧63种胚的酯酶同工酶差异明显且稳定。经过高温、高湿处理的种子活力明显下降,并随着处理时间与相对湿度的增加,下降趋势越明显,说明温度和相对湿度是影响种子活力的重要因素。 相似文献
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本文就贵州主栽及备栽的40余个水稻杂交组合在稻飞虱的常发区6个试验点的抗虫性和耐害性试验结果进行了综述,参试水稻品种中,以D优63、汕优63、汕优多系1号、协优413、特优63、D优67、岗优22、Ⅱ优46和岗优37的抗虫性和耐害性为好,且在两个以上的试验区表现稳定,可作为省内主载杂稻品种推广使用。 相似文献
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普通小麦、簇毛麦及其双二倍体的酯酶同工酶分析 总被引:1,自引:0,他引:1
本文分析了六倍体普通小麦农大146、簇毛麦及其杂种和双二倍体的全展旗叶及种子的酯酶同工酶酶谱,结果表明:子代与其双亲有密切的亲缘关系,形成了偏母互补型;子代双单倍体 (2n=28) 和双二倍体 (2n=56) 旗叶酯酶同工酶酶谱有相当的一致性;不同发育阶段、不同组织器官酯酶同工酶基因表达不同。 相似文献
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为探索谷子杂种优势形成机理,首次以张杂谷3号、5号和6号及其父母本为材料,通过聚丙烯酰胺凝胶电泳技术研究了不同品种不同生育期酯酶、谷草转氨酶、谷氨酸脱氢酶同工酶酶谱特性。结果表明:张杂谷酯酶同工酶共分离出14条带,杂种和父母本酶谱不同,有互补酶谱和显性酶谱;谷草转氨酶同工酶共分离出7条带,杂种和父母本属于同型酶谱;谷氨酸脱氢酶同工酶只有1条带,属于同型酶谱;不同品种不同生育期酯酶和谷草转氨酶酶带数和酶活性存在差异,酯酶和谷草转氨酶同工酶与杂种优势相关;谷氨酸脱氢酶同工酶与杂种优势关系不明显。 相似文献
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介绍了运用冷冻干燥技术进行速溶蛋花汤的加工,研究了生产工艺、特点以及影响产品质量的主要因素。试验表明,采用冷冻干燥技术加工的速溶蛋花汤,具有营养丰富、风味独特、方便快捷等特点。 相似文献
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DENG Zhao-jing 《保鲜与加工》2005,(1):153-156
A new definition of inertia,i.e. the momentum is the measuring of inertia of matter, is proposed. The article through and etc., subjects, the correctness of the new notion of inertia:The monentum is the measuring of inertia has been demonstrated, and the unsolved contradictions of the traditional definition of inetia. And the mass is the measuring of inertia has been revealed. 相似文献
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香蕉是热带亚热带发展中国家重要的粮食作物和碳水化合物来源。但近年来,香蕉生产受到严重的病虫危害。大多数香蕉栽培品种是三倍体,生长周期长,而且不孕。由于没有种子,给繁殖和育种带来一定的困难。遗传转化技术的发展为香蕉品种的改良提供了一种有效的手段。香蕉的遗传转化方法有电激法、基因枪法、农杆菌介导法等。农杆菌介导法的应用是香蕉品种改良的一个重大突破。香蕉遗传转化的外植体也发展到多种,有原生质体,胚性细胞悬浮系,分生组织,以及横切薄片等。近几年,随着分子生物学的发展,出现了转化效率更高,重复性更好的香蕉遗传转化技术。如农杆菌和基因枪结合法,离心辅助农杆菌介导法、真空渗透技术等。这些新技术新方法的出现,必将推动香蕉产业高速发展。 相似文献
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基于RS与GIS技术,利用景观生态学理论及景观格局指数对布尔津县土地利用现状进行定量分析。结果显示为:(1)布尔津县以草地、林地为主要景观类型,镶嵌着耕地、水域等景观类型。(2)四个分区(即高山区、丘陵区、平原区、荒漠区)的林地资源组成差异明显,耕地、居民、交通及工矿用地集中分布在丘陵区和平原区(3)从各项指数来看,高山区的多样性指数较低;平原区是受人文因素最多的区域,景观优势度低,各种土地利用类型比例差异不大,有利于生态可持续发展,但要合理的开发利用;荒漠区生态环境相对脆弱,要加强生态环境的保护与改善。通过该研究对布尔津县的土地利用现状作一个了解,为该县乃至整个地区的景观规划和可持续发展战略提供科学依据。 相似文献
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Efficiency of water use of early plantings of sunflower 总被引:4,自引:0,他引:4
M. Auxiliadora Soriano Francisco Orgaz Francisco J. Villalobos Elías Fereres 《European Journal of Agronomy》2004,21(4):465-476
Rain fed crop production in Mediterranean environments depends to a large extent on strategies that avoid the intense summer drought. Early plantings of sunflower have given consistently higher yields in such environments, but the basis for such yield increases has not been explored. We conducted two field experiments at Cordoba (Spain) to investigate the effects of an early and a late planting date on the components of water-limited crop productivity; namely, water use (T), water use efficiency (TE) and harvest index (HI) of sunflower. The results were generalized by simulating rain fed sunflower yields, under early (1 January) and late (15 March) plantings, for a 25-year period with the aid of a simulation model of the Ceres type (OILCROP-SUN) which has been validated in Cordoba. Experimental seed yields of early plantings in 1989 and 1996 were 2.0 and 3.0 t ha−1, while late plantings yields were 1.3 and 2.4 t ha−1, for the 2 years. Average simulated yields were 2.7 ± 1.1 and 1.9 ± 0.7 t ha−1 for early and late plantings, respectively. For the 2 years, T of early plantings was higher than that of late plantings, but the response of TE and HI to planting date was not the same in the two experiments. In the simulation exercise, T and TE of early plantings were consistently higher than those of late plantings, while there were no differences in the HI for the two planting dates. We conclude that early plantings of sunflower increase rain fed yields by increasing both T and TE, while the impact of planting date on HI very much depends on the crop water stress pattern, which is quite variable from year to year even in the predictable Mediterranean environment. 相似文献
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The cotyledon and hypocotyl of eight varieties of alfalfa( Medicago sativa L. )are used to study the effect of different cultivation procedures and genotypes on embryogenic callus and embryoid induction,plant development and transplant of alfalfa.The varieties of alfalfa with high embryoid induction rate and high differentiation rate are screened. A high frequency regeneration system for alfalfa tissue culture is established:which is benifical to the gene transformation of alfalfa. 相似文献
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Automobile comfort dynamic simulation is necessary when we predict and evaluate the comfort of a automobile or optimize performance of automobile. The nine DOF vibration model of automobile is established , which acts root mean square value of body in multiple work conditions as comfort evaluation indices. Based on the comfort simulation, the Hongyan 1160 is predicted in the way of comfort. The programmes can be used in many different automobiles . The computational result indicates that the model can simulate vibration of automobile truly. It is significant to research automobile comfort evaluation to optimize performance of automobile and comfort simulation .The computational program can be applied to optimize or simulate which has some reference value. 相似文献