Using RFLP analysis with three probes homologous to specific regions of mitochondrial DNA genes and PCR analysis of the mitochondrial recombining-repeat-sequence 18S/5S region of cereals, five alloplasmic wheat lines of different origin and fertility expression were studied. These lines are self-pollinated progeny of BC1-BC4 generations of barley–wheat hybrids Hordeum geniculatum All. (2n = 28) × Triticum aestivum L. (2n = 42). It was found that recombinant alloplasmic lines characterized by partial fertility contain either maternal (barley) DNA fragments or maternal and paternal (wheat) DNA fragments simultaneously (heteroplasmy). In lines with stable expression of self-fertility, fragments of only paternal mitochondrial DNA were detected. It is assumed that in alloplasmic lines, there is the interrelation between the presence of definite fragments of the mitochondrial genome belonging to either parental type and fertility expression.
Russian Journal of Genetics – Springer Journals
Published: Apr 12, 2005
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