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Identification of allelic variations of puroindoline genes controlling grain hardness in wheat using a modified denaturing PAGE

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Abstract

Puroindoline genes (Pina and Pinb) form the molecular basis of wheat grain hardness or texture. Variations in either gene are reported to be associated with grain hardness in wheat. Here, a modified denaturing PAGE was used to detect Pina and Pinb allelic variations in 102 common wheat cultivars and other species related to wheat. Two variations of Pina (Pina-D1b and Pina-D1p) and five variations of Pinb (null, Pinb-D1b, Pinb-D1u, Pinb-D1v and Pinb-D1w) were identified in common (T. aestivum) and spelt wheats (T. aestivum ssp. spelta). No allelic variation was found in Tibet semi-wild wheat (T. aestivum ssp. tibetanum), club wheat (T. compactum), or Aegilops  tauschii. Puroindoline genes were absent in wild␣emmer (T. turgidum var. dicoccoides). The sequencing results of the PCR fragments from Pina and Pinb (except for null type) indicated allelic variants carrying single base mutation, such as Pina-D1p, Pinb-D1u, Pinb-D1v and Pinb-D1w were novel types. Our results showed that the modified PAGE used in this study provided a satisfactory resolving power for identifying single nucleotide mutations; therefore, it is a practical and simple tool to study allelic variation of Pina and Pinb in wheat and related species.

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Abbreviations

ARMS:

Amplification Refractory Mutation System

ASO:

Allele Specific Oligonuceotide

ASP:

Allelic Specific Primers

DGGE:

Denaturing Gradient Gel Electrophoresis

SSCP:

Single Strand Conformation Polymorphism

STS:

Sequenced Tagged Site

SDS-PAGE:

Sodium Dodecyl Sulphate Polyacrylamide Gel Electrophoresis

A-PAGE:

Acidic Polyacrylamide Gel Electrophoresis

2-D PAGE:

Two-dimensional Polyacrylamide Gel Electrophoresis

TBE:

Tris-Boric acid-EDTA

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Acknowledgements

We thank Dr. Shi-he Xiao (Institute of Crop Sciences in CAAS) and Prof. Qi-xin Sun (CAU) for kindly providing materials. We also thank the two anonymous reviewers for valuable comments on this manuscript and Dr. Hong-Wei Cai (Forage Crop Research Institute, Japan Grassland Agriculture & Forage Seed Association) for helpful discussion on the manuscript. This work was supported by a grant from National Natural Foundation of China (Number 30270823, 30471076).

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Correspondence to Baoyun Li.

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Chang, C., Zhang, H., Xu, J. et al. Identification of allelic variations of puroindoline genes controlling grain hardness in wheat using a modified denaturing PAGE. Euphytica 152, 225–234 (2006). https://doi.org/10.1007/s10681-006-9204-6

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  • DOI: https://doi.org/10.1007/s10681-006-9204-6

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