Lec7_Feb1-2010_Shreier-AdaptGenVar

Lec7_Feb1-2010_Shreier-AdaptGenVar - Adaptive Genetic...

Info iconThis preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon
Adaptive Genetic Variation Andrea Shreier 2/1/10 Chapter 6 and Mullens et al. 2009 material Copyright Evolution 2007
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Neutral vs. Adaptive DNA Neutral genes Non-coding Not linked to trait under selection Adaptive DNA code for genes or regions controlling gene expression Responsible for morphological, physiological traits Building blocks of evolution
Background image of page 2
What can we learn from adaptive genetic markers? Adaptive potential – ability to adapt to environmental changes Correlation btwn adaptive genetic diversity and fitness Differences in selection pressures among populations What genes code for important ecological traits
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Selection 101 Directional selection Diversifying selection Graphics courtesy of sparknotes.com
Background image of page 4
Selection 101 Balancing selection Graphics courtesy of sparknotes.com
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Correlation btwn neutral and adaptive genetic diversity Neutral genetic diversity used as a proxy for adaptive genetic diversity Reintroduction programs use high genetic diversity as criteria for source selection Captive breeding programs aim to preserve genetic diversity in endangered populations www.operationmigration.org
Background image of page 6
Is this supported by literature? Sometimes Eelgrass w/ high neutral genetic diversity recover better from environmental disturbance (Reusch et al. 2005) Some papers show corr between Fst and Qst, others show opposite Generally low correlation www.helcom.fi
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Important to consider… Correlation btwn high neutral genetic diversity and demographic processes in viable populations Genes adaptive in one time/place not necessarily adaptive in another Correlation between neutral markers and “neutral”
Background image of page 8
Image of page 9
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 25

Lec7_Feb1-2010_Shreier-AdaptGenVar - Adaptive Genetic...

This preview shows document pages 1 - 9. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online