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Different genetic components control coat-imposed and embryo-imposeddormancy in wheat

  • John E. Flintham (a1)
Abstract
Abstract

Wheat grain dormancy is a multigenic trait controlled both by R genes conferring red testa pigmentation and by other genes, at least one of which has a major effect in the embryo. Enhanced grain dormancy and red test colour are inherited as pleiotropic effects of dominant R alleles at triplicate loci in hexaploid wheat. However, polymorphism for R genes cannot account for the wide variation in dormancy observed among different redgrained varieties. A variety of different dominant R alleles all have equivalent effects on dormancy when introgressed into white-grained wheats, although the latter vary in dormancy both in the absence and in the presence of dominant R alleles. As a result, certain redgrained genotypes can exhibit intermediate dormancy, similar to that of some white-grained genotypes with different genetic backgrounds. A new major gene (Phs) was identified as controlling the difference between two red-grained cultivars with widely different dormancies. The Phs gene appeared to exert its effect in the embryo of the grain, in contrast to R gene expression in maternal testa tissue. Discrete genetic functions thus underlie physiologically distinct mechanisms of coatimposed dormancy and embryo-imposed dormancy in wheat

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*Fax: (01603) 502241 Email: john.flintham@bbsrc.ac.uk
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R.E. Allan and O.A. Vogel (1965) Monosomic analysis of red seed color in wheat. Crop Science 5, 474475.

J.A. Anderson , M.E. Sorrells and S.D. Tanksley (1993) RFLP analysis of genomic regions associated with resistance to pre-harvest sprouting. Crop Science 33, 453459.

R.H. Biffen (1905) Mendel's laws of inheritance and wheat breeding. Journal of Agricultural Science 1, 448.

E. Czarnecki (1988) A method for germinating immature spring wheat. Canadian Journal of Plant Science 68, 797799.

P.S. Kettlewell , R.B. Sothern and W.L. Koukkari (1999) U.K. wheat quality and economic value are dependent on the North Atlantic oscillation. Journal of Cereal Science 29, 205209.

D.A. Laurie and S. Reymondie (1991) Highfrequencies of fertilization and haploid seedling production in crosses between commercial hexaploid wheat varieties and maize. Plant Breeding 106, 182189.

W.R. Lawson , I.D. Godwin , M. Cooper and P.S. Brennan (1997) Genetic analysis of pre-harvest sprouting tolerance in three wheat crosses. Australian Journal of Agricultural Research 48, 215221.

R.J. Metzger and B.A. Silbaugh (1970) Location of genes for seed coat color in hexaploid wheat, Triticumaestivum L. Crop Science 10, 495496.

J.C. Nelson , A.E. Van Deynze , E. Autrique , M.E. Sorrells , Y.H. Lu , S. Negre , M. Bernard and P. Leroy (1995) Molecular mapping of wheat. Homoeologous group 3. Genome 38, 525533.

J.S. Noll , P.L. Dyck and E. Czarnecki (1982) Expression of RL4137 type of dormancy in F1 seeds of reciprocal crosses in common wheat. Canadian Journal of Plant Science 62, 345349.

J.K. Roy , M. Prasad , R.K. Varshney , H.S. Balyan , T.K. Blake , H.S. Dhaliwal , H. Singh , K.J. Edwards and P.K. Gupta (1999) Identification of a microsatellite on chromosomes 6B and a STS on 7D of bread wheat showing an association with preharvest sprouting tolerance.Theoretical and Applied Genetics 99, 336340.

P. Stam and A.C. Zeven (1981) The theoretical proportion of the donor genome in near-isogenic lines of selffertilizers bred by backcrossing. Euphytica 30, 227238.

D. Wang , F.E. Dowell and R.E. Lacey (1999) Predicting the number of dominant R alleles in single wheat kernels using visible and near-infrared reflectance spectra. Cereal Chemistry 76, 68.

J. Wu and B.F. Carver (1999) Sprout damage and preharvest sprout resistance in hard white winter wheat. Crop Science 39, 441447.

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Seed Science Research
  • ISSN: 0960-2585
  • EISSN: 1475-2735
  • URL: /core/journals/seed-science-research
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