The crossability of wheat with rye and other related species

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Abstract

The crossability of hexaploid wheat Triticum aestivum with rye is controlled by two loci, and Kr2 where the dominant alleles reduce crossability, Kr1 being more and Kr2 less potent in this respect. The kr1 gene is located on the long arm of chromosome 5B, while kr2 is located on the long arm of chromosome 5A. Some authors have reported that chromosome 5D also carries a gene, Kr3, influencing crossability with rye, while some Chinese landraces carry the kr4 gene located on chromosome 1A of wheat. Most European wheat varieties carry dominant Kr alleles and thus have very low crossability with rye. Recessive kr alleles are mostly carried by wheat varieties from China, Japan, Siberia, or other Asiatic regions. The crossability locus Kr1 was fine mapped using molecular markers with the help of 29 recombinant lines, between the markers Xw5145 and DR740708 on the 5BL long arm in Norwich, UK. A second region responsible for crossability was also detected on the 5BL arm. The Skr locus on the 5B short arm was identified as a major QTL inhibiting the crossability of wheat with rye in Clermont-Ferrand, France. Two SSR markers completely linked to SKr were used to evaluate a collection of crossable wheat progenies. The cfb306 marker, closely linked to SKr, is an efficient marker for the introduction of crossability into wheat germplasm through marker-assisted selection

Original languageEnglish
Title of host publicationAlien Introgression in Wheat: Cytogenetics, Molecular Biology, and Genomics
PublisherSpringer International Publishing
Pages103-120
Number of pages18
ISBN (Print)9783319234946, 9783319234939
DOIs
Publication statusPublished - Jan 1 2015

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Keywords

  • Crossability alleles kr1 kr2
  • Genetic mapping of the crossability alleles
  • Rye
  • Wheat

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)

Cite this

Molnár-Láng, M. (2015). The crossability of wheat with rye and other related species. In Alien Introgression in Wheat: Cytogenetics, Molecular Biology, and Genomics (pp. 103-120). Springer International Publishing. https://doi.org/10.1007/978-3-319-23494-6-4