Complementary sex determination substantially increases extinction proneness of haplodiploid populations.

@article{citeulike:296031, abstract = {The role of genetic factors in extinction is firmly established for diploid organisms, but haplodiploids have been considered immune to genetic load impacts because deleterious alleles are readily purged in haploid males. However, we show that single-locus complementary sex determination ancestral to the haplodiploid Hymenoptera (ants, bees, and wasps) imposes a substantial genetic load through homozygosity at the sex locus that results in the production of inviable or sterile diploid males. Using stochastic modeling, we have discovered that diploid male production (DMP) can initiate a rapid and previously uncharacterized extinction vortex. The extinction rate in haplodiploid populations with DMP is an order of magnitude greater than in its absence under realistic but conservative demographic parameter values. Furthermore, DMP alone can elevate the base extinction risk in haplodiploids by over an order of magnitude higher than that caused by inbreeding depression in threatened diploids. Thus, contrary to previous expectations, haplodiploids are more, rather than less, prone to extinction for genetic reasons. Our findings necessitate a fundamental shift in approaches to the conservation and population biology of these ecologically and economically crucial insects.}, address = {Department of Biology, York University, 4700 Keele Street, Toronto, ON, Canada M3J 1P3.}, author = {Zayed, A. and Packer, L. }, citeulike-article-id = {296031}, comment = {hymenoptera 膜翅目 | aculeate 針の有る | solitary 単生・独居性 | self-incompatibility 自家不和合性}, doi = {10.1073/pnas.0502271102}, issn = {0027-8424}, journal = {Proc Natl Acad Sci U S A}, keywords = {05matheco14, cat\_population\_biology, conservation\_genetics, diploid\_male\_production, haplodiploidy, hymenoptera, method\_model, pollinator\_decline}, month = {July}, number = {30}, pages = {10742--10746}, posted-at = {2005-08-17 10:26:41}, priority = {0}, title = {Complementary sex determination substantially increases extinction proneness of haplodiploid populations.}, url = {http://dx.doi.org/10.1073/pnas.0502271102}, volume = {102}, year = {2005} }

TY - JOUR ID - citeulike:296031 L3 - citeulike-article-id:296031 TI - Complementary sex determination substantially increases extinction proneness of haplodiploid populations. JF - Proc Natl Acad Sci U S A VL - 102 IS - 30 SP - 10742 EP - 10746 AD - Department of Biology, York University, 4700 Keele Street, Toronto, ON, Canada M3J 1P3. SN - 0027-8424 N2 - The role of genetic factors in extinction is firmly established for diploid organisms, but haplodiploids have been considered immune to genetic load impacts because deleterious alleles are readily purged in haploid males. However, we show that single-locus complementary sex determination ancestral to the haplodiploid Hymenoptera (ants, bees, and wasps) imposes a substantial genetic load through homozygosity at the sex locus that results in the production of inviable or sterile diploid males. Using stochastic modeling, we have discovered that diploid male production (DMP) can initiate a rapid and previously uncharacterized extinction vortex. The extinction rate in haplodiploid populations with DMP is an order of magnitude greater than in its absence under realistic but conservative demographic parameter values. Furthermore, DMP alone can elevate the base extinction risk in haplodiploids by over an order of magnitude higher than that caused by inbreeding depression in threatened diploids. Thus, contrary to previous expectations, haplodiploids are more, rather than less, prone to extinction for genetic reasons. Our findings necessitate a fundamental shift in approaches to the conservation and population biology of these ecologically and economically crucial insects. KW - 05matheco14 KW - cat_population_biology KW - conservation_genetics KW - diploid_male_production KW - haplodiploidy KW - hymenoptera KW - method_model KW - pollinator_decline N1 - hymenoptera 膜翅目 | aculeate 針の有る | solitary 単生・独居性 | self-incompatibility 自家不和合性 AU - Zayed, A AU - Packer, L PY - 2005/07/26/ UR - http://dx.doi.org/10.1073/pnas.0502271102 ER -