Mapping Quantitative Trait Loci for Resistance to Downy Mildew in Pearl Millet
Field and Glasshouse Screens Detect the Same QTL
E. S. Jonesa,
W. A. Breeseb,
C. J. Liuc,
S. D. Singhd,
D. S. Shawb and
J. R. Witcombe*,b
a Plant Biotechnology Centre, Agriculture Victoria, La Trobe Univ., Bundoora VIC 3083, Australia
b School of Biological Sciences, Univ. of Wales, Bangor, Gwynedd LL57 2UW, UK
c CSIRO Plant Industry, Long Pocket Lab., 120 Meiers Road, Indooroopilly QLD 4068, Australia
d Int. Crops Research Inst. for the Semi-Arid Tropics, Patancheru AP 502 324, India

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Fig. 1. Frequency distribution of disease incidence in F4 families.
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Fig. 2. Log of the odds (LOD) profiles for associations between molecular markers and disease incidence analyzed using composite interval mapping for (A) field screens (solid line = India/Field-1; dashed line = India/Field-2), (B) glasshouse screens (solid line = India/Ghs, dashed line = UK/Ghs), and (C) average effects across all screens (solid line = predicted means, dashed line = multiple interval mapping). Each graph represents a linkage group. The horizontal line across each graph indicates the level of significance for the presence of a quantitative trait locus estimated from permutation analyses. Note that the y-axis for LG1 is on a different scale to accommodate the high LOD.
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Copyright © 2002 by the Crop Science Society of America.