Abstract
Comparisons were made of levels of chromosome pairing in pentaploid hybrids between normal and ph 1b -and ph 2 -mutant forms of Triticum aestivum ssp. vulgare cv. Chinese Spring each crossed with Triticum kotschyi and T. turgidum var. dicoccoides. Higher levels of multivalent formation in the ph 1b -kotschyi, compared with the ph 1b -dicoccoides pentaploid was attributed mainly to the absence of allelic buffering, by the Ph 1 allele, in the Kotschyi pentaploid and its presence in the dicoccoides pentaploid. The higher level of homoeologous pairing in the ph 2 -dicoccoides pentaploid compared with that of kotschyi was believed to be due to differential levels of homoe-and non-homoallelic buffering in the two pentaploids. The high level of homoeologous pairing caused by the ph 2 -mutant in the dicoccoides pentaploid indicates a potential use of pairing promoters, free of homoallelic buffering, as a means of increasing thelevel of homoeologous pairing in wheat and in certain of its hybrids with alien species.
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Kushnir, U., Halloran, G.M. Regulation of homoeologous pairing in pentaploid wheat hybrids. Genetica 58, 47–50 (1982). https://doi.org/10.1007/BF00056002
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DOI: https://doi.org/10.1007/BF00056002