Host specialization in phytophagous insects
WebPHYTOPHAGOUS INSECTS 245 fitness, assumed to be independent of the number of insects using a particular host species, is governed by another. If a newly encountered host plant (e.g. a resistant crop variety or an introduced weed) is accepted for oviposition but is less suitable for development than are ancestral hosts, then an insect popula- WebFeb 21, 2008 · Most phytophagous insects tend to be host plant specialists, feeding and carrying out virtually all key life-history activities (e.g., mate-acquisition and reproduction) on one or a relatively small subset of closely related plant species (Futuyma 1991; Bernays and Chapman 1994; Thompson 1994; Novotny and Basset 2005).
Host specialization in phytophagous insects
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WebThe evolution of host specialization in phytophagous insects is generally thought to involve genetic trade-offs that prevent individuals from maximizing fitness simultaneously on two or more hosts. Several hypotheses, however, have suggested that trade-offs may not be evident in experiments comparing larval performance on normal and novel hosts. WebJun 14, 2024 · Introduction. Host-selection in phytophagous insects is a complex process mediated by many factors including oviposition stimulants [1, 2], feeding stimulants (phagostimulants) [], vision [], experience [], and deterrents [].The preference-performance hypothesis explains the phenomenon of host specificity by positing that adult insects …
WebApr 8, 2013 · The specialization in host use would be one of the scenarios in the evolutionary process of feeding habits in phytophagous insects, because the evolution of … WebJan 1, 2009 · Phytophagous insects are generally considered to be those that feed on green plants. They include species that attack roots, stems, leaves, flowers, and fruits, either as larvae or as adults or in both stages. Leaf feeders may be external (exophytic) or they may mine the tissues, sometimes even specializing on a particular cell type.
WebMar 12, 2024 · Why do herbivorous insects tend to be host specialists? Population genetic models predict specialization when there is antagonistic pleiotropy at a gene for host-use performance. But... WebDec 20, 2016 · The phylogenetic history of Cardinium seems to be driven by physiological specialization of the host and horizontal transmission acting at different degrees. It …
WebMay 27, 2024 · As a result, the host specialization hypothesis lacks empirical support for important phytophagous insect clades. Here, we …
WebApr 8, 2013 · Host specialization is a ubiquitous character of phytophagous insects. The polyphagous population is usually composed of some subpopulations that can use only a few closely related plants. Cotton-melon aphids, Aphis gossypii Glover exhibited strong host specialization, and the cotton- and cucurbits-specialized biotypes had been clearly … la motta messinaWebhost race Neochlamisus phytophagous insects pleiotropy premating isolation reproductive isolation Download chapter PDF References Abe, Y., 1991. Host race formation in the gall wasp Andricus mukigawae. Ent. Exp. Appl. 58: 15–20. CrossRef Google Scholar Adams, D. & D.J. Funk, 1997. la motta seenWebApr 6, 2015 · The loci controlling host recognition are far from being identified, but pioneering works on the evolutionary and functional mechanisms of chemosensation have been conducted in Drosophila, helped by the availability of complete sequenced genomes and the subsequent identification of large chemosensory gene families in this genus [ 23, … lamotta jakeWebPhytophagous insects represent a very particular not really belong to their host plant range. This may group of organisms. Firstly, their number amounts lead to mistaken conclusions … assassin\\u0027s j1WebInvestigations of the causes of host specialization in insects could contribute substantially to the understanding of the origin and maintenance of diversity in this group. Insects are by far the most diverse group of organisms on Earth; estimates of their current diversity range as high as 30 million species (58). A large fraction of these species feed on plants (154, … la motta seen vienenburgWebWe investigated site-specific host records for more than 7,500 species of insect herbivores. Although host specialists predominate, the proportion of specialists is affected by the … la motta rossaWebDec 9, 2024 · A recent review found that most studies on candidate genes for specialization to hosts in phytophagous insects focus on resistance or detoxification of plant secondary … assassin\\u0027s ix