Unreduced gamete formation in wheat × Aegilops spp. hybrids is genotype specific and prevented by shared homologous subgenomes

Plant Cell Reports
Zhaleh FakhriAnnaliese S Mason

Abstract

The presence of homologous subgenomes inhibited unreduced gamete formation in wheat × Aegilops interspecific hybrids. Unreduced gamete rates were under the control of the wheat nuclear genome. Production of unreduced gametes is common among interspecific hybrids, and may be affected by parental genotypes and genomic similarity. In the present study, five cultivars of Triticum aestivum and two tetraploid Aegilops species (i.e. Ae. triuncialis and Ae. cylindrica) were reciprocally crossed to produce 20 interspecific hybrid combinations. These hybrids comprised two different types: T. aestivum × Aegilops triuncialis; 2n = ABDU(t)C(t) (which lack a common subgenome) and T. aestivum × Ae. cylindrica; 2n = ABDD(c)C(c) (which share a common subgenome). The frequency of unreduced gametes in F1 hybrids was estimated in sporads from the frequency of dyads, and the frequency of viable pollen, germinated pollen and seed set were recorded. Different meiotic abnormalities recorded in the hybrids included precocious chromosome migration to the poles at metaphase I and II, laggards in anaphase I and II, micronuclei and chromosome stickiness, failure in cell wall formation, premature cytokinesis and microspore fusion. The mean frequency of rest...Continue Reading

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Citations

Sep 2, 2019·Plant Cell Reports·Sylwia OleszczukJanusz Zimny
May 1, 2017·Plant Cell Reports·Ghader MirzaghaderiAnnaliese S Mason
Feb 11, 2019·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Ghader Mirzaghaderi, Annaliese S Mason
May 31, 2019·Frontiers in Plant Science·Masahiro Kishii
Nov 24, 2021·Protoplasma·Sergey MursalimovElena Deineko

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