[PDF] Top 20 On the Differences Between Maximum Likelihood and Regression Interval Mapping in the Analysis of Quantitative Trait Loci

... in Figure 1, a–c. If the linked QTL show epistasis, the wider, QTL position moves from boundary to middle advantage gained by the ML method becomes even of an interval, the difference of QTL effects is larger, ... See full document

... QTL analysis in crosses between outbred lines that allows for QTL segregation within lines as well as for differences in mean QTL effects between ...“segment mapping” that is based in ... See full document

... the quantitative trait loci (QTL) influencing birth- weight, weaning weight, yearling weight, and preweaning and postweaning average daily gains was performed by geno- typing half-sib progeny of four ... See full document

... The estimates of the recombination fraction, the QTL allele frequency and the estimated QTL genotype effects when using K-casein or @casein as genetic markers indicate that t[r] ... See full document

... which maximum-likelihood or regression interval mapping only animals with extreme phenotypes are genotyped (Lander and Botstein 1989; Haley and Knott 1992; (see Lebowitz et ...The ... See full document

... single analysis, since they all share ation of all tests that would be conducted in a high- the same null hypothesis of zero ...a trait with of this conceptual difference have been discussed pre- many QTL ... See full document

... Estimated QTL location (cM) 14 18 125 59 F-statistics 2.69ns 3.87ns 3.24ns 11.87ns Likelihood Ratio 2.51 3.51 2.62 4.82 F-threshold (P<0.05) 9.11 10.19 13.59 30.22 95% Conf. Interv (cM) 4.5-124.0 13.5-132.0 ... See full document

... identifying loci of high inter- this ...action between QTL and genetic background in a one- nome search for QTL is ...information interval mapping (IM; Lander and Botstein 1989) from the ... See full document

... The regression approxima- tion may be needed to provide stronger evidence for tion to the LOD score deviates substantially from the the presence of two QTL on chromosome ...difference between the sis ... See full document

... isolation: Between 5 and 10 g of young, fully simplex, duplex, double-simplex, and multi-allelic markers expanded leaves were harvested from glasshouse-grown plants, were analyzed by cluster analysis to ... See full document

... spaced in the genome or those preidentified markers plete-data partial-likelihood score function given the that explain most of the genetic variation in the genome. observed data. The solution to this conditional ... See full document

... One-way analysis of vari- cases, such as for qtl9, there was considerable range in ance was used to test for differences in mean life span the point ...confidence interval for the fourth them (142) ... See full document

... WELLER, 1994 Mapping and analysis of dairy cattle quantitative trait loci hy maximum likelihood methodology using milk protein genes as genetic markers.. SCHULER, 1990[r] ... See full document

... for mapping quantitative trait loci (QTL), called multiple interval mapping (MIM), is ...of maximum likelihood for estimating genetic ...QTL mapping could be ... See full document

... a maximum-likelihood approach for fitting a single QTL Only the third term of the final sum depends on ␪ and model, considering one chromosome at a ...the likelihood equation. The term ... See full document

... Besides of increased power of the statisti- cal test and higher precision of estimation of the ge- netic parameters, the proposed approach allows for an integral evaluati[r] ... See full document

... In the open-field test, B6 mice traversed an average of 133.6 ⫾ 9.9 grid squares, including 18.9 ⫾ 2.9 center squares or 14% of the total. No fecal pellets were seen in 13 trials (Figure 2). A/ J mice traversed an ... See full document

... crosses between the ACI and COP rat strains was classified by genotype at the Ept9 marker D10Mit7 and then further classified by genotype at the Ept10 marker ...assess differences in pituitary mass ... See full document

... Table 4 gives the increase in mean test statistics, compared with the results in Table 2, obtained by the incorporation of information from the grandparental marker gen[r] ... See full document

... method for predicting the expected value of the likelihood was also derived and used to predict the lower bound sampling errors of the parameter estimates and the c[r] ... See full document