Abstract
We investigated the relationship between Anagallis arvensis and A. foemina using nuclear and plastid molecular data. Information from the nuclear rDNA internal transcribed spacer (ITS) region and four different chloroplast loci; ndhF, trnL-F, rpl16, and rps16 was analysed using both parsimony and Bayesian inference. Anagallis foemina was found to be most closely related to the perennial A. monelli, and not to A. arvensis. The existence of two different cpDNA haplotypes was revealed; one shared by Anagallis foemina, A. monelli, A. platyphylla, and one A. arvensis individual, while all other investigated A. arvensis individuals shared the second haplotype. Ancestral cpDNA polymorphism within Anagallis arvensis or hybridization are possible explanations, however, information in ITS data is too scarce to falsify any of these hypotheses.
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