Journal
GENETICS
Volume 172, Issue 3, Pages 1829-1844Publisher
GENETICS
DOI: 10.1534/genetics.105.051227
Keywords
-
Categories
Funding
- NIGMS NIH HHS [GM045344, P01 GM045344] Funding Source: Medline
Ask authors/readers for more resources
Evolutionary biologists seek to understand the genetic basis for multivariate phenotypic divergence. We constructed an F-2 mapping population (N = 539) between two distinct populations of Mimulus guttatus. We measured 20 floral, vegetative, and life-history characters on parents and F-1 and F-2 hybrids in a common garden experiment. We employed multitrait composite interval mapping to determine the number, effect, and degree of pleiotropy quantitative trait loci (QTL) affecting divergence in floral, vegetative, and life-history characters. We detected 16 QTL affecting floral traits; 7 affecting Vegetative traits: and 5 affecting selected floral, vegetative,and life-history traits. Floral and vegetative traits are clearly polygenic. We detected a few major QTL, with all remaining QTL of small effect. Most detected QTL are pleiotropic, implying that the evolutionary shift between these annual and perennial populations is constrained. We also compared the genetic architecture controlling floral trait divergence both within (our intraspecific study) and between species, on the basis of a previously published analysis of M. guttatus and M. nasutus. Eleven of our 16 floral QTL map to approximately the same location in the interspecific map based on shared, collinear markers, implying that there may be a shared genetic basis for floral divergence within and among species of Mimulus.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available