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Anterior development in the parthenogenetic and viviparous form of the pea aphid, Acyrthosiphon pisum : hunchback and orthodenticle expression
Author(s) -
Huang T.Y.,
Cook C. E.,
Davis G. K.,
Shigenobu S.,
Chen R. P.Y.,
Chang C.C.
Publication year - 2010
Publication title -
insect molecular biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.955
H-Index - 93
eISSN - 1365-2583
pISSN - 0962-1075
DOI - 10.1111/j.1365-2583.2009.00940.x
Subject(s) - acyrthosiphon pisum , biology , drosophila embryogenesis , blastoderm , pisum , embryo , botany , aphid , embryogenesis , genetics , microbiology and biotechnology , aphididae , homoptera , pest analysis
In the dipteran Drosophila , the genes bicoid and hunchback work synergistically to pattern the anterior blastoderm during embryogenesis. bicoid , however, appears to be an innovation of the higher Diptera. Hence, in some non‐dipteran insects, anterior specification instead relies on a synergistic interaction between maternally transcribed hunchback and orthodenticle . Here we describe how orthologues of hunchback and orthodenticle are expressed during oogenesis and embryogenesis in the parthenogenetic and viviparous form of the pea aphid, Acyrthosiphon pisum . A. pisum hunchback ( Aphb ) mRNA is localized to the anterior pole in developing oocytes and early embryos prior to blastoderm formation – a pattern strongly reminiscent of bicoid localization in Drosophila . A. pisum orthodenticle ( Apotd ), on the other hand, is not expressed prior to gastrulation, suggesting that it is the asymmetric localization of Aphb , rather than synergy between Aphb and Apotd , that regulates anterior specification in asexual pea aphids.