Broadening the Genetic Diversity of Common and Durum Wheat for Abiotic Stress Tolerance Breeding

  • Tsujimoto H
  • Sohail Q
  • Matsuoka Y
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Abstract

Four extra early-heading mutants, named extra early-fl owering1 ( exe1 ), exe2 , exe3 , and exe4 , were identifi ed in diploid einkorn wheat ( Triticum monococcum L.) following heavy-ion beam mutagenesis. Based on their phenotypes in the fi eld, the four exe mutants were classifi ed into two groups: Type I (moderately extra early-heading type; exe1 and exe3 ) and Type II (extremely extra early-heading type; exe2 and exe4 ). Analysis of VERNALIZATION 1 ( VRN1 ), a fl owering promoter gene, showed that it was more highly expressed at earlier stages of vegetative growth in Type II mutants than in Type I mutants. Our analyses indicate that the difference in earliness between Type I and Type II mutants is associated with differences in the expression level of VRN1 .

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Tsujimoto, H., Sohail, Q., & Matsuoka, Y. (2015). Broadening the Genetic Diversity of Common and Durum Wheat for Abiotic Stress Tolerance Breeding. In Advances in Wheat Genetics: From Genome to Field (pp. 233–238). Springer Japan. https://doi.org/10.1007/978-4-431-55675-6_25

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