TY - JOUR
T1 - Cryptic genetic variation for arabidopsis thaliana seed germination speed in a novel salt stress environment
AU - Yuan, Wei
AU - Flowers, Jonathan M.
AU - Sahraie, Dustin J.
AU - Purugganan, Michael D.
N1 - Publisher Copyright:
© 2016 Yuan et al.
PY - 2016
Y1 - 2016
N2 - The expansion of species ranges frequently necessitates responses to novel environments. In plants, the ability of seeds to disperse to marginal areas relies in part to its ability to germinate under stressful conditions. Here we examine the genetic architecture of Arabidopsis thaliana germination speed under a novel, saline environment, using an Extreme QTL (X-QTL) mapping platform we previously developed. We find that early germination in normal and salt conditions both rely on a QTL on the distal arm of chromosome 4, but we also find unique QTL on chromosomes 1, 2, 4, and 5 that are specific to salt stress environments. Moreover, different QTLs are responsible for early vs. late germination, suggesting a temporal component to the expression of life history under these stress conditions. Our results indicate that cryptic genetic variation exists for responses to a novel abiotic stress, which may suggest a role of such variation in adaptation to new climactic conditions or growth environments.
AB - The expansion of species ranges frequently necessitates responses to novel environments. In plants, the ability of seeds to disperse to marginal areas relies in part to its ability to germinate under stressful conditions. Here we examine the genetic architecture of Arabidopsis thaliana germination speed under a novel, saline environment, using an Extreme QTL (X-QTL) mapping platform we previously developed. We find that early germination in normal and salt conditions both rely on a QTL on the distal arm of chromosome 4, but we also find unique QTL on chromosomes 1, 2, 4, and 5 that are specific to salt stress environments. Moreover, different QTLs are responsible for early vs. late germination, suggesting a temporal component to the expression of life history under these stress conditions. Our results indicate that cryptic genetic variation exists for responses to a novel abiotic stress, which may suggest a role of such variation in adaptation to new climactic conditions or growth environments.
KW - Abiotic stress
KW - QTL
KW - Salinity tolerance
KW - Salt stress
KW - bulk segregant analysis
UR - http://www.scopus.com/inward/record.url?scp=84994589890&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84994589890&partnerID=8YFLogxK
U2 - 10.1534/g3.116.033944
DO - 10.1534/g3.116.033944
M3 - Article
C2 - 27543295
AN - SCOPUS:84994589890
SN - 2160-1836
VL - 6
SP - 3129
EP - 3138
JO - G3: Genes, Genomes, Genetics
JF - G3: Genes, Genomes, Genetics
IS - 10
ER -