, Volume 25, Issue 1, pp 167–174 | Cite as

The genetics of naked oats (Avena nuda L.)

  • G. Jenkins
  • P. R. Hanson


The inheritance of the character complex of naked grain and multiflorous spikelets was studied in a diallel set of crosses comprising five varieties of naked oats (Avena nuda)-As 78, Manu, Caesar, Nuprime and AJ86/2/1-and one variety of husked oats (A. sativa), Maris Oberon. In the F1 generation the distribution of multiflorous spikelets was in all cases similar to that of the mid-parent. Crosses between the varieties of A. nuda produced only naked grain on plants in the F1 and F2 generations, indicating that ‘nakedness’ in the varieties studied was determined by the same loci.

The three-gene model proposed by Moule (1972) for the determination of A. nuda characters was inadequate to account for the observed F2 segregation in naked x husked crosses. An extension of this model is proposed to include a third modifying gene, N3, which in the homozygous dominant condition produces the husked phenotype when the principal gene, N, is heterozygous. The model assumes complex epistatic relationships between the three modifying genes N1, N2 and N3. Published information and further experimental data suggest that the genotype NN--N3N3 is uncommon. The expression of the genes determining nakedness was greatly influenced by the environment.

Index words

Avena nuda oats naked grain multiflorous spikelets genetics 


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  1. Boland, P. & D. A. Lawes, 1973. The inheritance of the naked grain character in oats studied in a cross between the naked variety Caesar and the husked variety BO 1/11. Euphytica 22: 582–591.Google Scholar
  2. Bonnett, O. T., 1966. Inflorescences of maize, wheat, rye and oats: their initiation and development. Bull. Ill. agric. Exp. Stn 721: 92–105.Google Scholar
  3. Clamot, G., 1969. Etude de l'hérédité du caractère ‘Grain nu’ chez l'avoine. Bull. Rech. agron. Gembloux IV: 323–338.Google Scholar
  4. Emme, E. K. & A. I. Mordvinkina, 1939. Hybrids of the 14-chromosome naked oats. Bull. Acad. Sci. URSS Sér. Biol. 530–540.Google Scholar
  5. Frankel, O., 1975. Base-sterile speltoids: the location of the Bs gene of Trtiticum aestivum. Proc. R. Soc. London, B188, 163–166.Google Scholar
  6. Frankel, O. & M. Roskam, 1975. Stability of floral differentiation in Triticum. Proc. R. Soc., Lond. B 188: 139–162.Google Scholar
  7. Jenkins, G., 1968. Naked oats. N.A.A.S. q. Rev. 79: 120–126.Google Scholar
  8. Jenkins, G., 1973. The effect of sowing data and photoperiod on panicle morphology in naked oats. Ann. appl. Biol. 73: 85–94.Google Scholar
  9. Jensen, N. F., 1961. F. A. Coffman (Ed.), Oats and oat improvement. Agronomy 8: 188. American Society for Agronomy, Madison, Wisc.Google Scholar
  10. Lebedev, V. N., 1930. Factorial analysis of characters distinguishing Avena nuda L. from A. Sativa L. I. Coarseness of the outer floret paleae. (Russian.) Trudy Belotserk. Selek. STantsii 5: 3–23.Google Scholar
  11. Martzenitzyna, K. K., 1950. On hybrids of naked and common oats. (Russian.) Agrobiologiya: 43–59.Google Scholar
  12. Mather, K., 1938. The measurement of linkage in heredity. Methuen, London, pp. 132.Google Scholar
  13. Moule, C., 1972. Contribution a l'étude de l'hérédité du caractère ‘grain nu’ chez l'avoine cultivée. Annls Amél. Pl. 22: 335–361.Google Scholar

Copyright information

© H. Veenman en Zonen B.V. 1976

Authors and Affiliations

  • G. Jenkins
    • 1
  • P. R. Hanson
    • 1
  1. 1.Plant Breeding InstituteTrumpington, CambridgeEngland

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