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果蝇培养过程中各环节的优化 总被引：3，自引：0，他引：3
果蝇的培养技术是进行果蝇遗传学实验的保证。本文对果蝇培养过程中有关文献中没有介绍的内容如野生果蝇的诱捕和一些没有详细说明的内容如麻醉量。以及麻醉时间的控制、管塞的选择等作了详细的补充,把实践中不易把握的步骤如雌雄鉴别等做了改进。 相似文献
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张志达 《廊坊师范学院学报》1997,(3)
笔者针对中学生物教学谈谈做好“果蝇唾腺染色体观察”实验的注意事项及体会.1、材料的准备此实验可用野生果蝇为材料.在秋天可用腐烂发酵的水果来诱捕野生果蝇.以葡萄效果最佳.将成熟葡萄的果皮剥开放在广口瓶里,置于室外背阴、无风的地方.不久便有果蝇飞到瓶中,直接把诱捕到的果蝇转到实验用培养基中会引起培养基发霉.为降低培养基霉变的可能性,可将同样大小的消过毒的广口瓶的瓶口与诱捕瓶的瓶口对接.振动诱捕瓶将果蝇赶入消过毒的广口瓶中.让果蝇在消毒中爬行一、二个小时后转入另一消毒瓶中.再过一、二小时后转入实验培养基中培养.2、幼虫的培养 相似文献
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本实验以模式生物果蝇为实验材料,包括红眼果蝇和白眼果蝇两种不同的品系,以0.05mg/mL、0.1mg/mL、0.5mg/mL、1 mg/mL四个不同浓度梯度的CuSO4染毒组以及空白对照组培养果蝇,以其F1代果蝇的生长发育速度、雌雄比例、亲本的生殖能力作为测量终点,探讨不同浓度的铜离子对果蝇的生长发育的影响.结果表明：1 mg/mL组对卵具有致死效应,在不致死浓度范围内,随着铜离子的浓度增加,果蝇从卵发育为成虫的速度越慢,且生殖能力越低.含有CuSO4的培养基培养的果蝇其F1代果蝇的雌雄比例也高于空白组.可见铜离子对果蝇具有发育毒性和生殖毒性. 相似文献
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果蝇繁殖迅速,培养较易,是中学遗传实验的良好材料。1982年春我校从广州引进四个品系的果蝇,用简易的温箱培养,使果蝇安全地越过了几个冬夏,对生物教学起了积极的作用。果蝇生长最适温度是20°—25℃,不能低于15℃,也不能高于28℃。我校无恒温箱,而 相似文献
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果蝇培养基长霉的处理措施 总被引：1，自引：0，他引：1
果蝇是常用的遗传学实验材料。在果蝇的培养和保种过程中，常会出现培养基长霉现象；培养基一旦长霉后，不仅影响果蝇生长，而且将身上沾满了霉菌孢子的果蝇接种到新的培养基中，会污染新的培养基。因此培养基长霉问题，对于培养和保种果蝇将是一件非常棘手的事情。本文就如何预防培养基长霉以及长霉后的处理方法做一探讨。 相似文献
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观察果蝇唾腺染色体时一般选用唾腺得到充分发育的果蝇第三令幼虫作为实验材料。这些幼虫最好在10℃—15℃低温下培养,因为低温培养的幼虫较25℃常温下培养的幼虫唾腺要大,此外培养条件要好,培养瓶中的幼虫不应过多,要使幼虫能充分发育。这里介绍一种较简便的果蝇唾腺染色体制片法。一、取材: 果蝇幼虫有唾腺一对,由单层豆粒状细胞构成,白色透明,呈香肠状。在腺体前端由一条三叉形的唾腺管伸入口腔,位在食道的两侧, 相似文献
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李国泰 《通化师范学院学报》2014,(2):45-47
本实验研究了果蝇白眼基因与小翅基因遗传距离的测定,选择白眼小翘的果蝇做为母本,母本必须为处女蝇,红眼长翅果蝇为父本,进行杂交培养,最终得到四种果蝇类型：红眼长翅果蝇,白眼小翅果蝇,红眼小翅果蝇,白眼长翅果蝇．并对果蝇白眼基因与小翅基因遗传距离进行了测定．结果表明果蝇的小翅基因与焦刚毛基因闻的重组率为24％,遗传距离为24cM． 相似文献
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高校遗传学和高中生物教材中,都有“观察果蝇唾液腺细胞的巨大染色体”实验。目前高中生物的这个实验,常常因实验材料不易得到,欲做而不能。笔者经过多年实践,发现一种城乡都易做到的野生果蝇的采集和幼虫的培养、保存的简易方法,现介绍如下: 相似文献
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The study of parasites and their likely influence on optimal foraging and mate-selection in animals has attracted much attention
in recent times. The possible effects of parasites on the host include the manipulation of host behaviour by parasites and
the emergence of host behavioural adaptations for protecting against parasitism. Self-medication in wild animals is believed
to be the behavioural adaptation evolved primarily against parasites and associated diseases. In this article, we have briefly
reviewed some types of unusual behaviour observed inmammals, birds and insectswhich can be considered as self-medication.
Rajasekar Raman is a PhD student in the Department of Animal Behaviour and Physiology, Madurai Kamaraj University. His research
interests include behavioural ecology and conservation of bats. Presently he is studying the roosting ecology of the tentmaking
fruit bat Cynopterus sphinx.
Sripathi Kandula is a Professor in Neurophysiology, Department of Animal Behaviour and Physiology, School of Biological Sciences,
Madurai Kamaraj University. His research interests are in the fileds of echolocation, social organization, mating system,
population genetics and conservation of bats. 相似文献
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陈佳君 《毕节师范高等专科学校学报》2009,(12):90-96
中国传统建筑是一套充满文化意义的意象系统。无论是微细的装饰、图样,或大型的构件与量体,都蕴含了丰富的意义。而素有“万福园”美称的北京恭王府,不仅是保存完善的传统王府建筑,更大量的运用象征福气与富贵的吉祥符码——蝙蝠,透显出独特的蝙蝠意象及其建筑关学。由意象学的角度切入,从天人关系归纳了恭王府蝙蝠意象的多样性,并指出了此祥瑞符号,在不断编码与译码的过程中,体现出的建筑意象美;而在府中运用相同或相似的蝙蝠造型,使之反复重现,亦能生发出回环美;此外更符合“多样的统一的美学原则,凸出和谐统一的关感效果。 相似文献
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民间刺绣中的蝙蝠图案,在融合中国传统文化和继承中国吉祥观念的基础之上发展而成,使蝙蝠图案在造型上结合了云纹纹样,民间艺人利用这一视觉符号来表达特定的吉祥观念,云纹纹样不仅作为主要结构出现在蝙蝠图像的头部和翅膀处,同时也成为重要的辅助图形,在发展中,逐渐成为独特、鲜活的民间艺术语言。 相似文献
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借鉴默会认识论的理论体系，结合持拍隔网对抗性项群教学实践活动的特点，提出了默会认识论与持拍隔网对抗性项群教学之间的相互联系，解释了在该项群教学实践活动中教师教学过程和学生认识过程的心理体验，对掌握持拍隔网对抗性项群技术教学策略和准确评价学生技术掌握阶段，从思维领域层面进行导向． 相似文献
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Twenty-one dyslexic boys, aged between 11¾ and 18, were presented with drawings of familiar objects and asked to name the part of the object to which an arrow pointed, for example the flex of an iron and the mane of a horse. They were also asked to explain the meanings of six words with only one meaning, six homophones (pier/peer), and six homographs (bat/bat). Nineteen control boys from the same background were also given the tests. No time constraints were imposed. It was found that the dyslexics were no less successful than the controls in finding the names for the parts of the objects and that they had no distinctive difficulty over homophones or homographs. However, when an analysis of errors was carried out, it was found that, in comparison with the controls, they produced more distortions of words (for instance bucker for buckle), gave fewer “don’t know” responses, and showed a greater tendency to repeat the parent word. In the case of the word-explanation tasks, they produced more examples of inappropriate usage (for example, in response to pier, “is what people walk along and fishing off”), more incomplete sentences, more repetitions, more misunderstandings of words, and more unnecessary amplifications of their original response. There was an equal tendency in both groups to ignore the indefinite article (for example, a bat. What is a bat?—“To bat a ball”). The dyslexics used fewer relative clauses, and there was marginal evidence for more frequent use of you and your and of er, um, and well. It is argued that among dyslexic adolescents, there remains a residual uncertainty which affects their oral language, and it is suggested that teachers should pay more attention to this weakness, since if a pupil cannot express himself adequately in speech, he is likely to show similar difficulties in his written work. 相似文献
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1999~2006年,对四川绵阳地区鼠耳蝠种类、数量、分布及部分生态习性进行了调查研究。共采集到鼠耳蝠6种,其中大足鼠耳蝠为中国特有种,IUCN RL(2003)将其列入接近受威胁的低危种(LR/nt)。中华鼠耳蝠被列入《中国物种红色名录》中的易危(VU)种。西南鼠耳蝠和须鼠耳蝠被列入《中国物种红色名录》中的近危(NT)种。青海鼠耳蝠为四川蝙蝠新记录。对鼠耳蝠的部分生态习性进行了描述。提出了鼠耳蝠命名和分类存在的一些问题,并探讨了几种鼠耳蝠的物种现状、保护及生态习性。 相似文献
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潘自舒 《商丘师范学院学报》2004,20(5):128-129
果树在农业生产中占据重要地位．发展果树生产是优化农业结构的重要措施．当前，果树生产中存在许多问题。诸如树种和品种搭配不合理，单产低、品质差，栽培模式和果园规划不合理等．果树发展的前景是广阔的．但要把握好发展方向． 相似文献