Table 1

Expected and simulated tetrasomicrecombination frequencies without chiasma interference
a. Two bivalents; expected recombination frequencies according to Haldane map function
Chrom. length 50 cM 100 cM 200 cM 400 cM
Interval (cM) Expected recomb Top Center Bottom Top Center Bottom Top Center Bottom Top Center Bottom
1 0.0099 0.0100 0.0100 0.0098 0.0100 0.0099 0.0099 0.0098 0.0100 0.0099 0.0098 0.0099 0.0099
2 0.0196 0.0196 0.0197 0.0195 0.0197 0.0196 0.0196 0.0196 0.0197 0.0195 0.0196 0.0197 0.0196
5 0.0476 0.0476 0.0478 0.0474 0.0477 0.0475 0.0476 0.0475 0.0479 0.0475 0.0476 0.0476 0.0475
10 0.0906 0.0907 0.0909 0.0905 0.0908 0.0907 0.0907 0.0905 0.0908 0.0906 0.0906 0.0907 0.0908
20 0.1648 0.1648 0.1650 0.1649 0.1650 0.1647 0.1648 0.1647 0.1648 0.1647 0.1647 0.1649 0.1648
50 0.3161 0.3161 0.3161 0.3161 0.3162 0.3160 0.3160 0.3162 0.3161 0.3159 0.3161
100 0.4323 0.4322 0.4322 0.4316 0.4328 0.4317* 0.4322 0.4324
200 0.4908 0.4909 0.4907 0.4910 0.4906
400 0.4998 0.4996
b. Cross-type quadrivalents; expected recombination frequencies according to Sved (1964) formula 3
Chrom. length 50 cM 100 cM 200 cM 400 cM
Interval (cM) Expected recomb.1 Top Center Bottom Top Center Bottom Top Center Bottom Top Center Bottom
1 0.0099 0.0095*** 0.0096*** 0.0095*** 0.0096*** 0.0096*** 0.0095*** 0.0099 0.0098 0.0099 0.0099 0.0098 0.0099
2 0.0197 0.0188*** 0.0189*** 0.0189*** 0.0190*** 0.0191*** 0.0189*** 0.0194** 0.0195 0.0194* 0.0195 0.0195 0.0196
5 0.0480 0.0458*** 0.0459*** 0.0459*** 0.0462*** 0.0463*** 0.0461*** 0.0473*** 0.0473*** 0.0472*** 0.0475* 0.0478 0.0477
10 0.0921 0.0878*** 0.0879*** 0.0878*** 0.0886*** 0.0891*** 0.0884*** 0.0902*** 0.0907*** 0.0904*** 0.0907*** 0.0916* 0.0910***
20 0.1703 0.1623*** 0.1624*** 0.1625*** 0.1636*** 0.1645*** 0.1631*** 0.1655*** 0.1668*** 0.1650*** 0.1648*** 0.1675*** 0.1651***
50 0.3420 0.3314*** 0.3304*** 0.3322*** 0.3299*** 0.3249*** 0.3332*** 0.3244*** 0.3178*** 0.3300*** 0.3177***
100 0.5000 0.5054*** 0.4834*** 0.4971*** 0.4833*** 0.4446*** 0.4824*** 0.4442***
200 0.6227 0.6668*** 0.5737*** 0.6298*** 0.5737***
400 0.6874 0.7411***
c. Parallel quadrivalents; expected recombination frequencies according to Sved (1964) formula 2
Chrom. length 50 cM 100 cM 200 cM 400 cM
Interval (cM) Expected recomb Top Center Bottom Top Center Bottom Top Center Bottom Top Center Bottom
1 0.0099 0.0099 0.0099 0.0101 0.0100 0.0099 0.0101 0.0100 0.0098 0.0100 0.0099 0.0099 0.0099
2 0.0197 0.0197 0.0197 0.0199* 0.0197 0.0196 0.0198 0.0198 0.0197 0.0197 0.0196 0.0198 0.0197
5 0.0484 0.0482 0.0483 0.0488** 0.0484 0.0482 0.0484 0.0485 0.0483 0.0484 0.0480* 0.0485 0.0484
10 0.0936 0.0934 0.0934 0.0942* 0.0935 0.0933 0.0939 0.0937 0.0936 0.0934 0.0932 0.0940 0.0937
20 0.1756 0.1755 0.1756 0.1760 0.1750 0.1754 0.1760 0.1755 0.1756 0.1755 0.1750 0.1758 0.1757
50 0.3649 0.3654 0.3645 0.3647 0.3652 0.3651 0.3652 0.3649 0.3649 0.3650 0.3651
100 0.5523 0.5520 0.5523 0.5522 0.5526 0.5520 0.5529 0.5523
200 0.6979 0.6982 0.6979 0.6983 0.6978
400 0.7464 0.7467

*, **, ***: Deviation from expected recombination frequency significant at P < 0.05, P < 0.01 or P < 0.001.

1: For cross-type quadrivalents the formula of Sved (1964) assumes a uniform distribution of the chromosome exchange point, whereas our simulations produce a unimodal distribution.

Voorrips and Maliepaard

Voorrips and Maliepaard BMC Bioinformatics 2012 13:248   doi:10.1186/1471-2105-13-248

Open Data