{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Biosciarizonaeduzdownloadtalks 2003lecture5ppt

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: usually predy good for 5- 10 genera/ons •  The validity for an ini/al h2 predic/ng response over several genera/ons depends on: •  The reliability of the ini/al h2 es/mate •  Absence of environmental change between genera/ons •  The absence of gene/c change between the genera/on in which h2 was es/mated and the genera/on in which selec/on is applied nitro.biosci.arizona.edu/zdownload/talks/ 2003/.../Lecture5.ppt •  Mul/ple genera/ons of response –  Cumula/ve selec/on response; t R(c)t = Σ R(i) i=1 nitro.biosci.arizona.edu/zdownload/talks/ 2003/.../Lecture5.ppt cumula/ve selec/on differen/al t •  S(c)t = Σ S(i) i=1 •  Ra/o es/mator for cumula/ve realized heritability: •  =total response/total differen/al •  h2r = R(c)t/S(c)t •  (there are other methods but we won’t worry about these) nitro.biosci.arizona.edu/zdownload/talks/ 2003/.../Lecture5.ppt example quan/ta/ve trait locus (QTL) mapping •  most traits of interest in nature are quan/ta/ve traits –  con/nuous varia/on in popula/on –  determined by varia/on in several or many genes –  “polygenic” •  how do we deter...
View Full Document

{[ snackBarMessage ]}