The molecular basis of genetic diversity among cytoplasms of triticum and aegilops spp 2. on the origin of poly ploid wheat cytoplasms as suggested by chloroplast dna restriction fragment patterns

Tsunewaki, K.; Ogihara, Y.

Genetics 104(1): 155-172

1983


ISSN/ISBN: 0016-6731
Accession: 006719823

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Abstract
In attempts to identify the phylogenetic donors of cytoplasm to Emmer-Dinkel and Timopheevi groups of wheat (Triticum), and the A. kotschyi-A. variabilis complex, the restriction fragment patterns of chloroplast DNA of representative species were compared with those of their putative diploid ancestors. The following 7 restriction enzymes were used: BamHI, EcoRI, HindIII, KpnI, PstI, SmaI and XhoI. The restriction fragment patterns of an Emmer and a Dinkel (common) wheat were identical with those of A. longissima, and different from those of A. aucheri, A. bicornis, A. searsii, A. sharonensis, A. speltoides and T. urartu by 4-12 fragments. The restriction fragment patterns of a Timopheevi wheat were identical with those of A. aucheri, and different from those of all other diploids by 4-9 fragments. The restriction fragment patterns of A. variabilis were identical to those of A. bicornis and A. searsii, and different from those of all other species. A. longissima, A. aucheri and A. bicornis (or A. searsii) were apparently the cytoplasm donors to the Emmer-Dinkel and the Timopheevi groups, and the A. kotschyi-A. variabilis complex, respectively. A diphyletic origin of Emmer and Timopheevi groups is supported by the present results.