, Volume 194, Issue 2, pp 207–218 | Cite as

Pleiotropic effects of the elongated glume gene P1 on grain and spikelet shape-related traits in tetraploid wheat



Wheat grain size and shape are associated not only with yield but also with product and milling quality. A subspecies of cultivated tetraploid wheat, Triticum turgidum ssp. polonicum, is characterized by elongated glumes. To elucidate morphological effects of the subspecies differentiation-related gene, we conducted QTL analysis for grain and spikelet shape using a mapping population between two tetraploid wheat subspecies, polonicum and durum. P1, the gene controlling the elongated glumes, was located on chromosome 7A, and the polonicum-type allele acted in an incomplete dominance manner to express the elongated glume phenotype. The polonicum allele of the P1 locus significantly affected not only glume length but also grain shape, spike shape, awn length and seed fertility in tetraploid wheat. The elongated glume phenotype was correlated with an increase in spike length, grain length and grain weight, and with a decrease in fertility, grain number and awn length. Thus, the subspecies differentiation-related gene in subspecies polonicum dramatically affects grain shape accompanied by alteration of spikelet shape in tetraploid wheat.


Morphology Natural variation Quantitative trait locus Subspecies differentiation Tetraploid wheat 

Supplementary material

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Supplementary material 1 (DOC 59 kb)
10681_2013_916_MOESM2_ESM.pdf (92 kb)
Supplementary material 2 (PDF 92 kb)


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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  1. 1.Graduate School of Agricultural Science, Kobe UniversityKobeJapan

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