Genotypic and environmental variance for white clover yield in a commercial breeding programme

Authors Organisations
Type Conference Proceeding (Non-Journal item)
Original languageEnglish
Title of host publicationSustainable meat and milk production from grassland
Subtitle of host publicationProceedings of the 27th General Meeting of the European Grassland Federation
EditorsB. Horan, D. Hennessy, M. O'Donovan, E. Kennedy, B. McCarthy, J. A. Finn, B. O'Brien
Place of PublicationFermoy
PublisherTeagasc
Pages228-230
Number of pages3
ISBN (Print)9781841706436
Publication statusPublished - 2018
Event27th EGF General Meeting: Sustainable meat and milk production from grasslands - Cork, Ireland
Duration: 17 Jun 201821 Jun 2018
Conference number: 27

Conference

Conference27th EGF General Meeting
CountryIreland
CityCork
Period17 Jun 201821 Jun 2018
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Abstract

Teagasc research demonstrates that incorporating white clover (Trifolium repens L.) into grazing swards contributes additional nitrogen (N) to grassland and increases forage quality leading to increased milk yields relative to grass-only swards, contributing to the economic and environmental sustainability of pastoral-based production systems. Two hundred and fifty eight full-sib white clover families were evaluated over three harvest years. Total yield of grass and clover was measured and the results were used to guide the development of new synthetic cultivars. In this paper we determine the genotypic and environmental variance and heritability of yield. The objective is to determine the potential of utilising these families to establish a training population to develop and assess genomic selection approaches for white clover breeding to improve agronomic performance. We found sufficient genotypic and phenotypic variation within this population and broad-sense heritability for forage yield was calculated as 0.76, indicating selection for forage yield will result in genetic gain