A dataset converted into a TD object containing data corresponding to an
F2 maize reference population from CIMMYT maize drought breeding program,
which was derived from the cross of a drought-tolerant line (P1) with a
drought susceptible line (P2) as described in detail by Ribaut et al. (1996,
DNA from 211 F2 plants was extracted to produce information for 132 co-dominant markers on 10 linkage groups. Phenotypic evaluations were performed on 211 F2:3 families, each one derived from an original F2 plant. The families were evaluated under different water and nitrogen regimes during 1992, 1994 and 1996. In the winter of 1992 three water regimes were imposed on the trials: well watered (NS), intermediate stress (IS) and severe stress (SS). In the winter of 1994, only the IS and SS trials were available. Nitrogen availability varied in the 1996 trials, with two low nitrogen treatments (LN, in winter and summer) and one high-nitrogen treatment (HN in summer). In each of the trials, five traits were evaluated but only grain yield is included in the data.
A TD object, a list containing 8 data.frames, each with the following columns:
trial, a combination of watering regime, year and nitrogen treatment
stress level, NS (no water stress), IS (intermediate water stress, SS (severe water stress), LN (low nitrogen) or HN (high nitrogen))
grain yield in tons
Ribaut JM, Hoisington DA, Deutsch JA, Jiang C, Gonzalez de Leon D (1996) Identification of quantitative trait loci under drought conditions in tropical maize.1. Flowering parameters and the anthesis-silking interval. Theor Appl Genet 92:905–914
Ribaut JM, Jiang C, Gonzalez de Leon D, Edmeades GO, Hoisington DA (1997) Identification of quantitative trait loci under drought conditions in tropical maize.2. Yield components and marker-assisted selection strategies. Theor Appl Genet 94:887–896
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