Imai T

Kawahara T

Yamane K

English

Sydney eScholarship

Phylogenetic relationships among Aegilops-Triticum species based on sequence data of chloroplast DNA  Kawahara T1, Yamane K1,2, Imai T1, 3 1Graduate School of Agriculture, Kyoto University, Muko, Japan, 2Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai, Japan, 3Kihara Institute for Biological Research, Yokohama City University, Yokohama Japan  This study analyzes intra-and interspecific variation in chloroplast DNA (cpDNA) in diploid and polyploid Aegilops-Triticum species.  The analysis focused on DNA sequence variation in noncoding regions of cpDNA, which included base-pair substitutions, 50 insertion/deletion loci, 7 microsatellite loci, and inversions.  Nine of 13 diploid Aegilops-Triticum species were successfully identified and genotyped using these data.  Sixty-two haplotypes were detected in 115 accessions of these diploid species.  Because of the large number of characters examined, novel deep relationships within and among Aegilops-Triticum species could be identified and evaluated.  Phylogenetic trees for the genus Aegilops-Triticum were constructed with Hordeum vulgare and Dasypyrum villosum as outgroups, and the results were compared to previous studies. These data support the following inferences: (1) Aegilops and Triticum should be merged; (2) groups D, T, M, N, U, and section Sitopsis (except Ae. speltoides) underwent speciation concurrently, but most diploid species evolved independently; (3) Ae. mutica does not occupy a basal position in Aegilops-Triticum; (4) Ae. speltoides is in a basal position and differs significantly from other Sitopsis species; (5) Ae. caudata is polyphyletic in all trees; (6) the genus Aegilops is paraphyletic with Secale, 7) origin of polyploid species generally follow those reported previously including several di- or polyphyletic origin; 8) T. dicoccoides and T. araraticum formed a cluster and this, further, formed a cluster with Ae. speltoides. 

Phylogenetic relationships among Aegilops-Triticum species based on sequence data of chloroplast DNA

https://ses.library.usyd.edu.au/bitstream/2123/3332/1/P076.pdf

Phylogenetic relationships among Aegilops-Triticum species based on sequence data of chloroplast DNA

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