Hostname: page-component-84b7d79bbc-4hvwz Total loading time: 0 Render date: 2024-07-26T07:22:51.203Z Has data issue: false hasContentIssue false
  • English
  • Français

The effect of seed rate and growing season on four oat cultivars: II. Culm morphology and panicle conformation

Published online by Cambridge University Press:  27 March 2009

I. T. Jones  and
J. D. Hayes
I. T. Jones
Affiliation:
Welsh Plant Breeding Station, Plas Gogerddan, Nr. Aberystwyth
J. D. Hayes
Affiliation:
Welsh Plant Breeding Station, Plas Gogerddan, Nr. Aberystwyth
Get access Rights & Permissions [Opens in a new window]

Summary

The effects of low and high seed rates on height, culm and panicle morphology of four oat cultivars grown in field trials in two growing seasons were investigated. Significant differences were detected between cultivars in the number of extended culm internodes, panicle whorls initiated, total height, length of panicle and individual internodes. Differences in seed rate had no effect on the number of culm internodes, but high seed rate significantly reduced the whorl number in the panicle, total plant height, length of panicle and the three upper internodes. The fourth internode remained unaffected, but the lowermost internode showed a relative length increase at high seed rate. The interaction of cultivar x seed rate was significant for total height, and for the length of the central internodes, but the length of the panicle was similarly affected in all cultivars.

Panicle conformation was markedly affected by seed rate; high population density caused a reduction in number of grain-bearing whorls, and reduced the number of spikelets and total grain weight per whorl, and 1000 grain weight particularly in the lowermost whorls. The percentage of husk in the grain was increased slightly at high seed rate. The effect of seed rate on culm and panicle morphology is discussed in relation to the development of stiffer-strawed oats.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 70 , Issue 3 , June 1968 , pp. 405 - 410
Copyright
Copyright © Cambridge University Press 1968

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Anon (1966). Maris Quest. Detailed description of varieties of wheat, barley and oats recommended by the N.I.A.B.Google Scholar
Bhamonchant, P. & Patterson, F. L. (1964). Association of morphological characters and lodging resistance in a cross involving Milford-type oats. Crop Sci. 4, 48–51.CrossRefGoogle Scholar
Bonnett, O. T. (1937). The development of the oat panicle. J. agric. Res. 54, 927–31.Google Scholar
Donald, C. M. (1962). In search of yield. J. Aust. Inst. agric. Sci. 28, 171–8.Google Scholar
Gott, M. B., Gregory, F. G. & Purvis, O. N. (1955). Studies in vernalization of cereals. XIII. Photoperiodic control of stages in flowering between initiation and ear formation in vernalized and unvernalized Petkus Winter Eye. Ann. Bot. 19, 87–126.CrossRefGoogle Scholar
Griffiths, D. J. (1961). The influence of different daylengths on ear emergence and seed setting in oats. J. agric. Sci., Camb. 57, 279–88.CrossRefGoogle Scholar
Jones, I. T. & Hayes, J. D. (1967). The effect of seed rate and growing season on four oat cultivars. I. Grain yield and its components. J. agric. Sci., Camb. 69, 103–9.CrossRefGoogle Scholar
Purvis, O. N. (1934). An analysis of the influence of temperature during germination on the subsequent development of certain winter cereals and its relation to the effect of length of day. Ann. Bot. 48, 919–55.CrossRefGoogle Scholar
Sieglinger, J. B. (1936). Leaf number of sorghum stalks. J. Am. Soc. Agron. 28, 636–42.CrossRefGoogle Scholar
Whyte, R. O. (1960). Crop Production and Environment. (London: Faber and Faber), p. 392.Google Scholar