SxM_map


The data is the well-known Steptoe x Morex doubled haploid population
developed in the early 90s by the North American Barley Mapping Project.
The objective was to improve in the understanding of the genetic basis of
agronomic and malting quality traits in barley.
The population consists of 150 doubled haploids lines;
of which 148 have been genotyped by SNP markers
(we use here 794 SNP markers).
The population was extensively evaluated for several agronomic and
malting quality traits (Hayes et al. 1993) in many locations and years
(US and Canada). In this example we use information on yield and heading
date in one of those trials.


datasets

Performs QTL mapping analysis for balanced and for
multi-environment and multi-trait analysis using mixed models.
Balanced population, single trait, single environment QTL mapping is
performed through marker-regression (Haley and Knott (1992) <DOI:10.1038/hdy.1992.131>,
Martinez and Curnow (1992) <DOI:10.1007/BF00222330>,
while multi-environment and multi-trait QTL
mapping is performed through linear mixed models.
These functions could use any of the following populations: double haploid,
F2, recombinant inbred lines, back-cross, and 4-way crosses.
Performs a Single Marker Analysis, a Single Interval Mapping,
or a Composite Interval Mapping analysis, and then constructs a final model
with all of the relevant QTL.

Gaston Quero

lmem.qtler

Linear Mixed Effects Models for QTL Mapping for Multienvironment
and Multitrait Analysis

SxM_map function

A data frame 794 row (markers) and 3 column.Column 1 gives the marker names,
column 2 the chromosome on which the marker has been mapped, and column 3 indicates
the position of the marker within the chromosome.

SxM_map: Name of the file containing genotypic (marker scores) information.

Description

Usage

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