Female sterility associated with increased clonal propagation suggests a unique combination of androdioecy and asexual reproduction in populations of Cardamine amara (Brassicaceae)

Annals of Botany
Andrew TedderKentaro K Shimizu

Abstract

The coexistence of hermaphrodites and female-sterile individuals, or androdioecy, has been documented in only a handful of plants and animals. This study reports its existence in the plant species Cardamine amara (Brassicaceae), in which female-sterile individuals have shorter pistils than seed-producing hermaphrodites. Morphological analysis, in situ manual pollination, microsatellite genotyping and differential gene expression analysis using Arabidopsis microarrays were used to delimit variation between female-sterile individuals and hermaphrodites. Female sterility in C. amara appears to be caused by disrupted ovule development. It was associated with a 2.4- to 2.9-fold increase in clonal propagation. This made the pollen number of female-sterile genets more than double that of hermaphrodite genets, which fulfils a condition of co-existence predicted by simple androdioecy theories. When female-sterile individuals were observed in wild androdioecious populations, their ramet frequencies ranged from 5 to 54 %; however, their genet frequencies ranged from 11 to 29 %, which is consistent with the theoretically predicted upper limit of 50 %. The results suggest that a combination of sexual reproduction and increased asexual proli...Continue Reading

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Citations

Jun 30, 2016·Molecular Ecology·Rie Shimizu-InatsugiKentaro K Shimizu
Nov 19, 2020·Proceedings. Biological Sciences·Kirsten Bomblies
Dec 10, 2020·Current Opinion in Plant Biology·Lei GuoZhongchi Liu
Mar 31, 2021·Molecular Biology and Evolution·Magdalena BohutínskáLevi Yant

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Methods Mentioned

BETA
dissection
light microscopy
chip
genotyping

Software Mentioned

ImageJ
PAMR
GENEMAPPER
topGO
Bioconductor package
GENEPOP
R

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