Cytological evidence for triploid males and females in the bumblebee, Bombus terrestris

Ayabe, Tokiyo; Hoshiba, Hidehiro; Ono, Masato

doi:10.1023/b:chro.0000021880.83639.4b

Cited by 45 publications

(54 citation statements)

References 9 publications

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“…Effective sterility of diploid males is thus likely to be more common than inviability, further increasing the effects of diploid male production on reducing N e . This is supported by recent reports of triploid females, the product of matings between females and diploid males, in several hymenopteran species (Krieger et al, 1999;Ayabe et al, 2004; reviewed by Liebert et al, 2004). Failure to incorporate diploid male production into population and conservation genetic models may lead to overestimates of N e , a parameter of great significance to the evolutionary genetics of the Hymenoptera, especially in populations expected to have low allelic diversity at the sex locus.…”

Section: Discussionmentioning

confidence: 77%

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Effective population size in Hymenoptera with complementary sex determination

Zayed

2004

Heredity

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Complementary sex determination in the haplodiploid Hymenoptera leads to the production of inviable or effectively sterile diploid males when diploid progeny are homozygous at the sex-determining locus. The production of diploid males reduces the number of females in a population and biases the effective breeding sex ratio in favor of haploid males. This in turn will reduce the effective population size (N e ) of hymenopteran populations with complementary sex determination relative to the expected reductions due to haplodiploidy alone. The effects of diploid male production on N e in hymenopterans with complementary sex determination when diploid males are either inviable or effectively sterile are assessed theoretically. In both models, low allelic diversity at the sex locus reduces the N e of hymenopteran populations, and this effect is largest when diploid males are effectively sterile.

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Section: Discussionmentioning

confidence: 77%

“…Both scenarios have been documented in the Hymenoptera in both natural and laboratory populations (eg Plowright and Pallett, 1979;Agoze et al, 1994;Duchateau et al, 1994;Cook and Crozier, 1995;Holloway et al, 1999;Krieger et al, 1999;Ayabe et al, 2004;Liebert et al, 2004).…”

mentioning

confidence: 97%

Effective population size in Hymenoptera with complementary sex determination

Zayed

2004

Heredity

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“…This may be explained by reduced survival of triploid males compared to triploid females, which has also been suggested for H. hebetor (Cook, 1993). To date, equal numbers of triploid males and females have only been reported for the bumblebee Bombus terrestris (Ayabe et al, 2004). We did not test the reproductive function of the triploid males, but we expect them to be sterile.…”

Section: Discussionmentioning

confidence: 91%

Diploid males sire triploid daughters and sons in the parasitoid wasp Cotesia vestalis

et al. 2007

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In the Hymenoptera, males develop as haploids from unfertilized eggs and females develop as diploids from fertilized eggs. In species with complementary sex determination (CSD), however, diploid males develop from zygotes that are homozygous at a highly polymorphic sex locus or loci. We investigated mating behavior and reproduction of diploid males of the parasitoid wasp Cotesia vestalis (C. plutellae), for which we recently demonstrated CSD. We show that the behavior of diploid males of C. vestalis is similar to that of haploid males, when measured as the proportion of males that display wing fanning, and the proportion of males that mount a female. Approximately 29% of diploid males sired daughters, showing their ability to produce viable sperm that can fertilize eggs. Females mated to diploid males produced all-male offspring more frequently (71%) than females mated to haploid males (27%). Daughter-producing females that had mated to diploid males produced more male-biased sex ratios than females mated to haploid males. All daughters of diploid males were triploid and sterile. Three triploid sons were also found among the offspring of diploid males. It has been suggested that this scenario, that is, diploid males mating with females and constraining them to the production of haploid sons, has a large negative impact on population growth rate and secondary sex ratio. Selection for adaptations to reduce diploid male production in natural populations is therefore likely to be strong. We discuss different scenarios that may reduce the sex determination load in C. vestalis.

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“…These males mate successfully, but often fail to produce viable offspring. It has also been possible to obtain triploid males and females and even a tetraploid female emerged (Duchateau et al, 1994;Duchateau and Mariën, 1995;Ayabe et al, 2004).…”

Section: Principles Of the Commercial Rearing Processmentioning

confidence: 99%

A century of advances in bumblebee domestication and the economic and environmental aspects of its commercialization for pollination

Velthuis¹,

Doorn²

2006

Apidologie

767

849

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-This paper reviews a century of progress in techniques of bumblebee rearing, starting with those used to encourage bumblebee queens to initiate a colony in artificial domiciles and including those needed for the commercial production of large numbers of colonies for the pollination of agricultural crops. Five species of bumblebees are currently used for crop pollination, the major ones being Bombus terrestris from Eurasia and Bombus impatiens from North America. As a result of their frequent use in foreign territories, there have been reports of B. terrestris becoming established, as well as interactions and/or competition with local (bumble-) bee fauna. Of the many vegetable, fruit and seed crops that bumblebees pollinate, greenhouse tomatoes are of predominant importance. In 2004, 40 000 ha of tomato crops were pollinated, with a crop value of e 12 000 million. The growers benefit from bumblebee pollination because of lower production costs, increased yields, and improved fruit quality. The interrelationship between commercial mechanisms and ecological risks is discussed.bumblebee / pollination / commercial rearing / economic value / ecological impact

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Cytological evidence for triploid males and females in the bumblebee, Bombus terrestris

Cited by 45 publications

References 9 publications

Effective population size in Hymenoptera with complementary sex determination

Effective population size in Hymenoptera with complementary sex determination

Diploid males sire triploid daughters and sons in the parasitoid wasp Cotesia vestalis

A century of advances in bumblebee domestication and the economic and environmental aspects of its commercialization for pollination

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