Population Genetics and Phenotypic Differentiation of Cotton Leafhoppers (Hemiptera: Cicadellidae) from Pakistan

IF 1.3 4区环境科学与生态学 Q3 ECOLOGY

Ecoscience Pub Date : 2019-12-26 DOI:10.1080/11956860.2019.1688915

M. Akmal, S. Freed, M. Schäfer, Wolf U Blankenhorn, M. Razaq, Ummad-ud-Din Umar

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Abstract

ABSTRACT The cotton leafhopper, Amrasca biguttula (Ishida), a sucking insect pest of cotton and vegetables, is present throughout Southeast Asia. Patterns of molecular and morphological differentiation among A. biguttula populations collected from seven cotton growing areas of Punjab, Pakistan, were studied by sequencing the barcode region of the mitochondrial cytochrome oxidase subunit 1 (COI) gene and by morphometrically analyzing wing shape. Molecular analysis revealed absence of isolation by distance (r = 0.075, P = 0.341) in spite of significant population differentiation (overall FST = 0.15 ± 0.06 (SE)). Also, haplotype diversity varied between populations, and neutrality tests indicated an excess of rare alleles in one of the seven areas. Although leafhopper populations are clearly shaped by genetic drift and possibly also by founder events, wing shape and size were conserved across the study area. These results have important implications for understanding the processes affecting patterns of molecular and morphological variations of pest insects that often are strongly controlled by agrochemical applications.

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巴基斯坦棉叶蝉(半翅目:叶蝉科)的种群遗传与表型分化

摘要棉叶蝉是一种危害棉花和蔬菜的吸血害虫，分布于东南亚各地。通过对线粒体细胞色素氧化酶亚基1（COI）基因条形码区域的测序和对翅膀形状的形态计量学分析，研究了从巴基斯坦旁遮普邦7个棉花种植区采集的大花A.biguttula种群的分子和形态分化模式。分子分析显示，尽管存在显著的群体分化（总体FST=0.15±0.06（SE）），但没有按距离分离（r=0.075，P=0.341）。此外，不同种群的单倍型多样性不同，中性测试表明，在七个区域中的一个区域存在过量的稀有等位基因。尽管叶蝉种群明显受到基因漂移的影响，也可能受到创始人事件的影响，但整个研究区域的翅膀形状和大小都是保守的。这些结果对理解影响害虫分子和形态变异模式的过程具有重要意义，而害虫的分子和形态变化模式往往受到农药应用的强烈控制。

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来源期刊

Ecoscience 环境科学-生态学

CiteScore

2.80

自引率

0.00%

发文量

审稿时长

>36 weeks

期刊介绍： Écoscience, is a multidisciplinary journal that covers all aspects of ecology. The journal welcomes submissions in English or French and publishes original work focusing on patterns and processes at various temporal and spatial scales across different levels of biological organization. Articles include original research, brief communications and reviews.