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Maximizing gain per effort by using clonal replicates in genetic tests.

D V Shaw1, J V Hood

  • 1International Forest Seed Company, P.O. Box 290, 35120, Odenville, AL, USA.

TAG. Theoretical and Applied Genetics. Theoretische Und Angewandte Genetik
|November 20, 2013
PubMed
Summary
This summary is machine-generated.

Clonal replicates enhance genetic gain predictions in recurrent selection for outcrossing plants. Using ramets in genetic tests increases cumulative genetic gain without additional testing effort.

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Area of Science:

  • Plant breeding
  • Quantitative genetics
  • Forestry

Background:

  • Recurrent selection is crucial for genetic improvement in outcrossing species.
  • Traditional models often overlook the benefits of clonal replication in genetic testing.
  • Forest tree breeding relies heavily on efficient selection strategies.

Purpose of the Study:

  • To develop models predicting cumulative genetic gain from recurrent selection including clonal replicates (ramets).
  • To investigate the impact of redistributing resources from individuals to ramets on genetic gain.
  • To determine the optimal number of ramets per family for forest tree breeding.

Main Methods:

  • Derivation of prediction models incorporating individual, family mean, and ramet observations.
  • Analysis of variance components and selection intensity under different resource allocations.
  • Simulation of genetic gain under varying numbers of ramets and families.

Main Results:

  • Models were developed to predict genetic gain considering clonal replicates.
  • Optimum number of ramets per family ranged from 1 to 6.
  • Efficiency gains (1.00–1.20) were observed when redistributing effort to ramets.
  • Increased cumulative genetic gain was achieved using clonal replicates without increasing test effort.

Conclusions:

  • Incorporating clonal replicates (ramets) into recurrent selection models improves genetic gain predictions.
  • Optimal use of ramets can enhance selection efficiency in breeding programs for outcrossing species.
  • Clonal replication offers a cost-effective strategy for increasing genetic gain in forest tree improvement.