Analysis and Answers to Frequently Asked Questions in Quantitative Trait Locus Mapping Phylogenetic Analysis of IPP Isomerase Gene in Haematococcus pluvialis Properties of the Test Statistic under Null Hypothesis and the Calculation of LOD Threshold in Quantitative Trait Loci (QTL) Mapping Maximum likelihood, Bayesian inference and likelihood ratio tests in the molecular phylogeny of Alismatales