Waxy protein deficiency and chromosomal location of coding genes in common wheat |
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Authors: | M Yamamori T Nakamura T R Endo T Nagamine |
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Institution: | (1) Okinawa Sub-tropical Station, Japan International Research Center for Agricultural Sciences, Ishigaki, 907 Okinawa, Japan;(2) Tohoku National Agricultural Experiment Station, Morioka, 020-01 Iwate, Japan;(3) Nara University, 1500 Misasagi-cho, 631 Nara, Japan |
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Abstract: | Deficiency of the wheat waxy (Wx) proteins (Wx-A1, Wx-B1 and Wx-D1) was studied in 1,960 cultivars derived from several countries. Gel electrophoretic analyses revealed that the null allele for the Wx-A1 protein occurred frequently in Korean, Japanese and Turkish wheats but was relatively rare in cultivars from other countries and regions. About 48% of the wheats deficient for the Wx-B1 protein were from Australia and India. One Chinese cultivar lacked the WxD1 protein. While 9 Japanese cultivars were deficient in both the Wx-A1 and Wx-B1 proteins, no cultivars lacked both the Wx-A1 and Wx-D1 proteins, both the Wx-B1 and Wx-D1 proteins or all three Wx proteins. Two-dimensional gel electrophoresis revealed polymorphisms of the three Wx proteins that varied according to isoelectric points or molecular weight. The Wx-A1 gene coding the Wx-A1 protein and the Wx-B1 gene coding the Wx-B1 protein were localized in the distal regions of chromosome arms 7AS and 4AL, respectively, by deletion mapping using the deletion lines developed in the common wheat cultivar Chinese Spring. |
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Keywords: | Waxy (Wx) protein Triticum aestivum Null allele Geographical distribution Chromosomal location |
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