Upcoming SlideShare
×

Genotype by environment interactions gx e and climate change

• 1,094 views

• Comment goes here.
Are you sure you want to
Be the first to comment
Be the first to like this

Total Views
1,094
On Slideshare
0
From Embeds
0
Number of Embeds
1

Shares
10
0
Likes
0

No embeds

Report content

No notes for slide

Transcript

• 1. Genotype by environment interactions (GxE) and climate change Jacob van Etten Alberto Labarga
• 2. GxE P = G + E + G*EP = ProductionG = GenotypeE = Environment
• 3. In other words...Suppose we have a continuous environmental variable two different genotypes i = {1,2}Now the regression equation becomes: P = (β0 +) β1Gi + β2E + β3GiE (+ e)
• 4. Purely genetic differenceP = β1Gi + β2E + β3GiEβ1 ≠ 0β2 = 0β3 = 0
• 5. Purely additive interactionP = β1Gi + β2E + β3GiEβ1 ≠ 0β2 ≠ 0β3 = 0
• 6. Non-additive interactionP = β1Gi + β2E + β3GiEβ1 ≠ 0β2 ≠ 0β3 ≠ 0
• 7. Cross-over:When does another variety take over? climate change →
• 8. Lobell et al. (2011) studyWeather Ecophysiological Yieldvariables variables Estimate Calculate statistical modelWeather Ecophysiological Yieldvariables variables+ 1 °C Predict using Recalculate estimated model
• 9. Lobell et al. (2011)
• 10. Climate change impact maps
• 11. GxE: OPV vs hybrid
• 12. GxE: duration
• 13. What breeders usually do: AMMIAdditive Main Effects and Multiplicative Interaction Production = G + E + residualsThen do a PCA on residuals to visualize the GxEinteractions.(An alternative is to only remove G – known as GGE.)
• 14. Example of AMMI Biplot Stress Normal
• 15. RDA: adding environmental variables