Asexual queen succession mediates an accelerated colony life cycle in the termite Silvestritermes minutus

被引:28
|
作者
Fougeyrollas, R. [1 ]
Krivanek, J. . [2 ,3 ]
Roy, V. [1 ]
Dolejsava, K. [2 ,3 ]
Frechault, S. [1 ]
Roisin, Y. [4 ]
Hanus, R. [2 ]
Sillam-Dusses, D. [5 ,6 ]
机构
[1] Univ Paris Diderot, Univ Paris Est Creteil, Univ Pierre & Marie Curie, CNRS,INRA,IRD,iEES Paris, 61 Ave Gen Gaulle, F-94010 Creteil, France
[2] Czech Acad Sci, Inst Organ Chem & Biochem, Chem Social Insects, Flemingovo 2, Prague 16610, Czech Republic
[3] Charles Univ Prague, Fac Sci, Albertov 6, Prague 12843, Czech Republic
[4] Univ Libre Bruxelles, Evolutionary Biol & Ecol, Av FD Roosevelt 50, B-1050 Brussels, Belgium
[5] Univ Paris Diderot, Univ Paris Est Creteil, IRD Sorbonne Univ,iEES Paris, Univ Pierre & Marie Curie,UMR 242,CNRS,INRA, 32 Ave Henri Varagnat, F-93143 Bondy, France
[6] Univ Paris 13, Sorbonne Paris Cite, LEEC, EA4443, 99 Ave JB Clement, F-93430 Villetaneuse, France
关键词
asexual queen succession; breeding system; life history; parthenogenesis; Silvestritermes minutus; termites; THELYTOCOUS-PARTHENOGENESIS; ISOPTERA RHINOTERMITIDAE; CLONAL REPRODUCTION; SEX; ANT; SYSTEM;
D O I
10.1111/mec.14095
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Mixed modes of reproduction, combining sexual processes with thelytokous parthenogenesis, occur in all major clades of social insects. In several species of termites, queens maximize their genetic input into nondispersing replacement queens through parthenogenesis, while maintaining genetically diverse sterile offspring and dispersing reproductives via sexual reproduction. This so-called asexual queen succession (AQS) has multiple independent origins and its presumed advantages are diverse as well, ranging from multiplication of colony reproductive potential to extension of its life-span beyond that of the foundress. However, how AQS shapes colony life cycles under natural conditions remains poorly known. The neotropical termite Silvestritermes minutus inhabits small but conspicuous nests, offering a unique opportunity to investigate the impact of AQS on life history. We report on its breeding system, life cycle and sex allocation using social structure census in 137 nests and genotyping of 12 colonies at 12 microsatellite loci. We show that colonies are established by an outbred pair of primary reproductives. In less than 2 years, the foundress is replaced by multiple neotenic queens, arising mostly through automixis with central fusion. Sterile castes, male and most (93%) female dispersers are produced sexually. Colony reproduction is usually restricted to a single dispersal of alates with unbiased sex ratio, taking place after 3 years. We conclude that S. minutus benefits from AQS to maximize colony growth rate and alate production within a very short life cycle rather than to extend colony lifespan. This highlights the versatile role of AQS in different cases of its polyphyletic origin.
引用
收藏
页码:3295 / 3308
页数:14
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