TABLE 2

One-locus and two-locus genotypic frequencies and chi-square tests in a population derived from a cross of Reventador maize × parviglumis teosinte

CRPF2 population
GenotypeObservedExpectedDisequilibriumExpectedDisequilibrium
Locus A
 AA0.20500.2228−0.01780.2500−0.0450
 Aa0.53420.49840.03580.50000.0342
 aa0.26090.2788−0.01790.25000.0109
Test for HWD
 at locus A:χ2 = 0.83; d.f. = 2;
 P = 0.6608χ2 = 1.76; d.f. = 2;
 P = 0.4152
Locus B
 BB0.24220.2562−0.01400.2500−0.0078
 Bb0.52800.50000.02800.50000.0280
 bb0.22980.2438−0.01400.2500−0.0202
Test for HWD
 at locus B:χ2 = 0.50; d.f. = 2;
 P = 0.7775χ2 = 0.55; d.f. = 2;
 P = 0.7585
Loci A–B
 AABB0.04970.04970.00000.0625−0.0128
 AABb0.13670.10820.02840.12500.0116
 AAbb0.01860.0471−0.02850.0625−0.0439
 AaBB0.12420.1294−0.00520.1250−0.0008
 AaBb0.26090.2820−0.02110.25000.0109
 Aabb0.14910.12280.02630.12500.0241
 aaBB0.06830.06320.00510.06250.0058
 aaBb0.13040.1377−0.00730.12500.0054
 aabb0.06210.06000.00220.0625−0.0004
Test for ZA
 for loci A–B:χ2 = 5.31; d.f. = 4;
 P = 0.2568χ2 = 4.19; d.f. = 4;
 P = 0.3805
  • Observed and expected genotypic frequencies and their differences (disequilibria) at two diallelic loci, UMC107 (designated as locus A) and BV302 (designated as locus B), in the BC3F2 population (Teosinte-M1L × Teosinte-M3L) derived from an original cross of Reventador maize × parviglumis teosinte as described by Doebley et al. (1995) and Kao and Zeng (2002) are shown. The expected values are derived under Cockerham's reference population (CRP) and the F2 population. Chi-square tests are carried out to determine the presence of Hardy-Weinberg disequilibria (HWD) at individual loci and zygotic associations (ZA) between the two loci. Sample size is n = 161.