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This article in CS

  1. Vol. 7 No. 5, p. 543
     
    Received: Mar 22, 1967
    Published: Sept, 1967


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doi:10.2135/cropsci1967.0011183X000700050042x

Effect of Natural Selection on Performance of a Barley Population1

  1. D. C. Rasmusson,
  2. B. H. Beard and
  3. F. K. Johnson2

Abstract

Abstract

A barley composite population obtained by mixing seed of 6,000 entries from the barley world collection was grown under severe stress, imposed by late planting, in Minnesota for 6 years. During this time the composite was advanced using a random lot of seed from the previous year's harvest. Remmant seed from each year ultimately was planted in yield trials to ascertain the change, if any, in the yield potential of the composite.

Yield of the population increased significantly indicating a substantial response to natural selection. The improvement amounted to 57% during the six years or an average of 9.5% for each year of natural selection.

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