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Laurie DA, Bennett MD. The effect of the crossability loci Kr1 and Kr2 on fertilization frequency in hexaploid wheat x maize crosses. Theor Appl Genet. 1987;73(3):403-9doi: 10.1007/BF00262508.
Laurie, D. A., & Bennett, M. D. (1987). The effect of the crossability loci Kr1 and Kr2 on fertilization frequency in hexaploid wheat x maize crosses. TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik, 73(3), 403-9. https://doi.org/10.1007/BF00262508
Laurie, D A, and Bennett, M D. "The effect of the crossability loci Kr1 and Kr2 on fertilization frequency in hexaploid wheat x maize crosses." TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik vol. 73,3 (1987): 403-9. doi: https://doi.org/10.1007/BF00262508
Laurie DA, Bennett MD. The effect of the crossability loci Kr1 and Kr2 on fertilization frequency in hexaploid wheat x maize crosses. Theor Appl Genet. 1987 Jan;73(3):403-9. doi: 10.1007/BF00262508. PMID: 24241002.
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Theor Appl Genet. 1987 Jan;73(3):403-9. doi: 10.1007/BF00262508.

The effect of the crossability loci Kr1 and Kr2 on fertilization frequency in hexaploid wheat x maize crosses.

TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik

D A Laurie, M D Bennett

Affiliations

  1. Plant Breeding Institute, Maris Lane, CB2 2LQ, Trumpington, Cambridge, England.

PMID: 24241002 DOI: 10.1007/BF00262508

Abstract

Dominant alleles of the Kr1 and Kr2 genes reduce the crossability of hexaploid wheat with many alien species, including rye and Hordeum bulbosum, with Kr1 having the greater effect. However, a cytological study of wheat ovaries fixed 48 h after pollination showed that the wheat genotypes 'Highbury' (kr1, Kr2) and 'Chinese Spring (Hope 5B)' (kr1, kr2) were crossable with 'Seneca 60' maize, fertilization occurring in 14.4 and 30.7% of embryo sacs respectively. The latter figure was similar to the 29.7% fertilization found in 'Chinese Spring' (kr1, kr2). Most embryo sacs in which fertilization occurred contained an embryo but lacked an endosperm and where an endosperm was formed it was usually highly aberrant. All three wheat x maize combinations were karyotypically unstable and rapidly eliminated maize chromosomes to produce haploid wheat embryos.

References

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