The need for sperm selection may explain why termite colonies have kings and queens, whereas those of ants, wasps and bees have only queens.
Hymenoptera have haploid males, which produce sperm by cloning. Sperm selection theory predicts that because termites have diploid males that produce genetically diverse sperm, they may profit from a high sperm surplus (large K), whereas Hymenoptera (ants, bees and wasps) should produce few sperm per fertilization (low K). Male reproductive "kings", which continuously provide spermatozoa during the whole life of the queen, allow for a large K. Available empirical evidence confirms the existence of a large difference in K between diploid insects, especially Blattodea (Isoptera) (K > 1,000), and haplo-diploids such as Hymenoptera (K < 10). The available data suggest that sperm selection may be an important evolutionary force for species with diploid, but not haploid males.
Jaffe
Klaus
K
Universidad Simón Bolívar, Caracas, Venezuela. kjaffe@usb.ve
D000818:Animals; D001000:Ants / Q000502:physiology*; D001516:Bees / Q000502:physiology*; D005260:Female; D020049:Isoptera / Q000502:physiology*; D008297:Male; D012098:Reproduction / Q000502:physiology; D012641:Selection, Genetic; D012726:Sexual Behavior, Animal / Q000502:physiology*; D013094:Spermatozoa / Q000502:physiology*; D014863:Wasps / Q000502:physiology*
Arch Androl. 2006 Jan-Feb;52(1):45-50
16338869
Dev Genet. 1995;16(2):95-103
7736670
Trends Ecol Evol. 1996 Feb;11(2):46-52
21237760
Proc Biol Sci. 2001 May 22;268(1471):1071-80
11375092
Proc Natl Acad Sci U S A. 1993 Sep 15;90(18):8412-4
11607424
Annu Rev Entomol. 2005;50:395-420
15822204
Sci Am. 1968 Apr;218(4):108-16
5640290
Proc Natl Acad Sci U S A. 2007 Oct 16;104(42):16604-8
17921254
Nature. 2001 Oct 11;413(6856):603-9
11595941
Nature. 2003 Jan 23;421(6921):360-3
12540898
Proc Biol Sci. 2003 Sep 22;270(1527):1965-70
14561311
Evolution. 1978 Jun;32(2):456-458
28563725
Evolution. 2004 Aug;58(8):1773-80
15446429
Biol Lett. 2007 Jun 22;3(3):331-5
17412673
Nature. 2006 Jun 15;441(7095):872-5
16778889
Mol Endocrinol. 2002 Mar;16(3):630-9
11875122
Nature. 2001 May 3;411(6833):41-2
11333967
J Theor Biol. 2003 Sep 7;224(1):27-42
12900202
Genetics. 1989 Sep;123(1):191-7
2806882