Outcrossing in New Zealand wheats measured by occurrence of purple grain

Griffin, W. B.

doi:10.1080/00288233.1987.10421885

Cited by 44 publications

(33 citation statements)

References 2 publications

(3 reference statements)

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“…One reason is that besides the normal inbreeding, a considerable amount of outcrossing occurs in fields of, for example, bread wheat (Griffin 1987;Martin 1990), and that wheat of different ploidy levels can be interfertile (e.g., McFadden and Sears 1946;MacKey 1966;Ohtsuka 1998). This allows many scenarios for obtaining genetic polymorphism.…”

Section: Discussionmentioning

confidence: 99%

About the origin of European spelt (Triticum spelta L.): allelic differentiation of the HMW Glutenin B1-1 and A1-2 subunit genes

2003

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To investigate the origin of European spelt (Triticum spelta L., genome AABBDD) and its relation to bread wheat (Triticum aestivum L., AABBDD), we analysed an approximately 1-kb sequence, including a part of the promoter and the coding region, of the highmolecular-weight (HMW) glutenin B1-1 and A1-2 subunit genes in 58 accessions of hexa-and tetraploid wheat from different geographical regions. Six Glu-B1-1 and five Glu-A1-2 alleles were identified based on 21 and 19 informative sites, respectively, which suggests a polyphyletic origin of the A-and B-genomes of hexaploid wheat. In both genes, a group of alleles clustered in a distinct, so-called beta subclade. High frequencies of alleles from the Glu-B1-1 and Glu-A1-2 beta subclades differentiated European spelt from Asian spelt and bread wheat. This indicates different origins of European and Asian spelt, and that European spelt does not derive from the hulled progenitors of bread wheat. The conjoint differentiation of alleles of the A-and B-genome in European spelt suggests the introgression of a tetraploid wheat into free-threshing hexaploid wheat as the origin of European spelt. Electronic Supplementary Material Supplementary material is available in the online version of this article at http://dx

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Section: Discussionmentioning

confidence: 99%

About the origin of European spelt (Triticum spelta L.): allelic differentiation of the HMW Glutenin B1-1 and A1-2 subunit genes

2003

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“…Clearly, under certain environmental conditions, some degree of outcrossing in wheat does occur (Griffi n 1987;Martin 1990) and hybrids of various ploidy levels can be formed (McFadden and Sears 1947;Ohtsuka 1998), both of which would indicate less of an evolutionary bottleneck in the development of hexaploid wheat than previously suggested. In addition, hexaploid wheat originated and still originates in a region where all of the progenitors reside, thus allowing for a continuous intercrossing and backcrossing with diploid progenitors.…”

Section: Origin Of Hexaploid Wheatmentioning

confidence: 91%

Wheat Evolution, Domestication, and Improvement

Gustafson

Raskina

et al. 2009

Wheat Science and Trade

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“…Outcrossing was detected at the very low level of 0.07% at 100 m from the source. These outcrossing rates are in the range of published frequencies averaging 1%, but that can vary between 0 to 6.7% at distances below 1 m (Griffin, 1987;Hucl, 1996;Zhao et al, 2000;Hucl & Matus-Cadiz, 2001;Loureiro et al, 2005), although hybrid seed set is also possible at greater distances.…”

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confidence: 92%