Phenotypic variability in the Old World bollworm, Helicoverpa armigera (Hübner) populations in India

IF 1.1 4区 生物学 Q4 ANATOMY & MORPHOLOGY
Acta Zoologica Pub Date : 2021-09-21 DOI:10.1111/azo.12407
Snehel Chakravarty, Rashmi M. Mahalle, Chandra P. Srivastava
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引用次数: 0

Abstract

Helicoverpa armigera (Hübner) is one of the most prominent polyphagous species of the Heliothinae pest complex that inflicts severe damage to a wide range of crops in India. Knowledge regarding the population structure of the pest species, whether morphological or genetic, is considered as an essential tool in making effective management decisions. Thus here, we performed the phenotypic characterization of H. armigera populations collected from varied geographic locations across India. Studied populations differed significantly for several external morphometric traits studied at larval, pupal and adult stages. Significant differences were also observed with respect to the intensity of black pigmentation on larval body as well as adult eye and forewing colour patterns. Besides external phenotypic traits, the length of genital organs like aedeagus and valva in males, and bursa copulatrix and bursa seminalis in females also differed significantly amongst populations. The dendrogram based on selected traits showed clear cut differentiation of studied populations into two major groups, one including all the South Zone populations and the other having populations from North and Central Zones. Differences based on phenotyping in the present study indicate the possibility of the existence of different subspecies within the Indian populations of H. armigera.

印度东半球棉铃虫、棉铃虫(Hübner)种群的表型变异
棉铃虫(Hübner)是Heliothinae害虫复合体中最突出的多食性物种之一,对印度的各种作物造成严重破坏。关于有害生物种群结构的知识,无论是形态学的还是遗传学的,都被认为是做出有效管理决策的重要工具。因此,在这里,我们对从印度不同地理位置收集的棉铃虫种群进行了表型表征。研究种群在幼虫、蛹和成虫阶段的几个外部形态计量学特征上存在显著差异。幼虫身上的黑色色素沉着强度以及成虫眼睛和前翅的颜色模式也存在显著差异。除了外部表型特征外,雄性的aedeagus和valva等生殖器官的长度,以及雌性的交配囊和精囊的长度也在不同群体中存在显著差异。基于所选性状的树状图显示,研究种群明显分化为两个主要群体,一个包括所有南区种群,另一个包括北区和中区种群。本研究中基于表型的差异表明,印度棉铃虫种群中存在不同亚种的可能性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Acta Zoologica
Acta Zoologica 生物-动物学
CiteScore
2.90
自引率
8.30%
发文量
35
审稿时长
>12 weeks
期刊介绍: Published regularly since 1920, Acta Zoologica has retained its position as one of the world''s leading journals in the field of animal organization, development, structure and function. Each issue publishes original research of interest to zoologists and physiologists worldwide, in the field of animal structure (from the cellular to the organismic level) and development with emphasis on functional, comparative and phylogenetic aspects. Occasional review articles are also published, as well as book reviews.
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