相关实验视频
Updated: May 10, 2025
06:30
Bioassays for Monitoring Insecticide Resistance
Published on: December 30, 2010
33.2K
在Dalbulus maidis (Hemiptera:Cicadellidae) 中的双林耐药性:遗传性,交叉耐药性和稳定性
Gabriel Silva Dias1, Eduardo Perkovski Machado1, Matheus Gerage Sacilotto1
1Department of Entomology and Acarology, Luiz de Queiroz College of Agriculture, University of São Paulo, Piracicaba, Brazil.
Pest management science
|April 25, 2025
概括
玉米叶跳 (Dalbulus maidis) 的抗甲状腺杀虫剂耐药性是以自体,不完全主导和多基因的方式遗传的. 这种耐药性是不稳定的,并表现出对其他杀虫剂的交叉耐药性,影响了昆虫耐药性管理策略.
科学领域:
- 昆虫学 昆虫学是一门学科.
- 抗虫剂耐药性 抗虫剂耐药性 抗虫剂耐药性
- 虫害管理 虫害管理 虫害管理
背景情况:
- 在巴西,Pyrethroids对于管理Dalbulus maidis (玉米叶) 是至关重要的.
- 在甲状腺控制中报告的失败需要了解抵抗机制.
- 选择了一种抗双林的D. maidis菌株进行实验室研究.
研究的目的:
- 调查D. maidis.中双林耐药性的遗传模式.
- 确定对其他类杀虫剂的交叉耐药性.
- 评估D. maidis种群中对双林耐药性的稳定性.
主要方法:
- 在实验室条件下选择一种抗双林的D. maidis菌株.
- 进行互交交叉和逆交叉来分析遗传.
- 测试对兰巴-西哈洛,伊米达克洛普里德,乙胺,甲基,碳硫和酸盐的交叉耐药性.
- 通过子研究评估耐药性稳定性,具有不同的耐药性/易感性比率和在没有选择压力的情况下在现场收集的种群.
主要成果:
- 与敏感菌株 (Sus) 相比,在选择的菌株 (Bif-R) 中观察到对双氨酸的3,170倍耐药性比率 (RR).
- 抗性遗传是自体的,不完全的主导的和多基因的.
- 发现了与兰巴-cyhalothrin,伊米达克洛普里德和阿塞塔米普里德 (RR300至2000倍) 的显著交叉耐药性.
- 没有检测到与甲基,碳硫或酸盐的交叉耐药性.
- 在D. maidis中抗Bifenthrin的耐药性是不稳定的,在消除选择压力后,在野外种群中LC50显著下降.
结论:
- 这项研究阐明了D. maidis.中对双林耐药性的遗传基础和遗传性.
- 这些发现突出了潜在的交叉耐药性问题,这对于杀虫剂选择至关重要.
- 耐药性的不稳定性表明,昆虫耐药性管理 (IRM) 策略可以有效地保持杀虫剂的有效性.
相关概念视频
01:18Dihybrid Crosses
71.4K
Overview
71.4K
01:20Monohybrid Crosses
226.7K
Overview
226.7K
01:49Probability Laws
37.9K
Overview
37.9K
01:43Incomplete Dominance
20.3K
Gregor Mendel's work (1822 - 1884) was primarily focused on pea plants. Through his initial experiments, he determined that every gene in a diploid cell has two variants called alleles inherited from each parent. He suggested that amongst these two alleles, one allele is dominant in character and the other recessive. The combination of alleles determines the phenotype of a gene in an organism.
20.3K
02:27Trihybrid Crosses
22.7K
Trihybrid Crosses
Some of Mendel’s crosses examined three pairs of contrasting characteristics. Such a cross is called a trihybrid cross. A trihybrid cross is a combination of three individual monohybrid crosses. For example, plant height (tall vs. short), seed shape (round vs. wrinkled), and seed color (yellow vs. green).
The F1 generation plants of a trihybrid cross are heterozygous for all three traits and produce eight gametes. Upon self-fertilization, these gametes have an equal...
Some of Mendel’s crosses examined three pairs of contrasting characteristics. Such a cross is called a trihybrid cross. A trihybrid cross is a combination of three individual monohybrid crosses. For example, plant height (tall vs. short), seed shape (round vs. wrinkled), and seed color (yellow vs. green).
The F1 generation plants of a trihybrid cross are heterozygous for all three traits and produce eight gametes. Upon self-fertilization, these gametes have an equal...
22.7K
01:21Frequency-dependent Selection
21.6K
When the fitness of a trait is influenced by how common it is (i.e., its frequency) relative to different traits within a population, this is referred to as frequency-dependent selection. Frequency-dependent selection may occur between species or within a single species. This type of selection can either be positive—with more common phenotypes having higher fitness—or negative, with rarer phenotypes conferring increased fitness.
21.6K