Effectiveness of ph gene in inducing homoeologous chromosome pairing in agrotricum

descriptionPublicationkeyboard_double_arrow_right Article 01 May 1977 English Publisher:Springer Science and Business Media LLCJournal:Theoretical and Applied Genetics, volume 51, pages 139-142 (issn: 0040-5752, eissn: 1432-2242,

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Authors: R C, Wang; G H, Liang; E G, Heyne;

doi: 10.1007/bf00273826

pmid: 24317691

Effectiveness of ph gene in inducing homoeologous chromosome pairing in agrotricum

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Abstract

We observed pairing, when the ph gene was present, between wheat (Triticum aestivum L. em. Thell.) chromosome 4B, and an Agropyron intermedium (Host) Beauv. chromosome (Ai) carrying a gene resistant to wheat streak mosaic (WSM). In a monosomic addition polyhaploid [2n = 22 = 19' + 5B' (ph) + 4B' + Ai'], we recorded an average of 4.1 bivalents and 0.3 trivalents per cell. Induced homoeologous pairing was most effective when both 5B chromosomes carrying ph gene were present. Our data suggest that chromosome 4B of wheat and the Agropyron chromosome (Ai) carrying a gene for resistance to WSM are homoeologous and that it is possible to use either ph mutant or nullisomic 5B stock to induce genetic recombination between the two chromosomes.

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