Please use this identifier to cite or link to this item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1133333
Title: Genomic selection in tropical forage grasses: current status and future applications.
Authors: SIMEÃO, R. M.
RESENDE, M. D. V. de
ALVES, R. S.
PESSOA FILHO, M. A. C. de P.
AZEVEDO, A. L. S.
JONES, C. S.
PEREIRA, J. F.
MACHADO, J. C.
Affiliation: ROSANGELA MARIA SIMEAO, CNPGC
RODRIGO S. ALVES, Instituto Nacional de Ciência e Tecnologia do Café, Universidade Federal de Viçosa, Viçosa, Brasil
MARCO AURELIO CALDAS DE PINHO PESSO, CPAC
ANA LUISA SOUSA AZEVEDO, CNPGL
CHRIS S. JONES, International Livestock Research Institute, Nairobi, Kenya
JORGE FERNANDO PEREIRA, CNPGL
JUAREZ CAMPOLINA MACHADO, CNPGL.
MARCOS DEON VILELA DE RESENDE, CNPCa
Date Issued: 2021
Citation: Frontiers in Plant Science, v. 12, article 665195, 2021.
Description: The world population is expected to be larger and wealthier over the next few decades and will require more animal products, such as milk and beef. Tropical regions have great potential to meet this growing global demand, where pasturelands play a major role in supporting increased animal production. Better forage is required in consonance with improved sustainability as the planted area should not increase and larger areas cultivated with one or a few forage species should be avoided. Although, conventional tropical forage breeding has successfully released well-adapted and high-yielding cultivars over the last few decades, genetic gains from these programs have been low in view of the growing food demand worldwide. To guarantee their future impact on livestock production, breeding programs should leverage genotyping, phenotyping, and envirotyping strategies to increase genetic gains. Genomic selection (GS) and genomewide association studies play a primary role in this process, with the advantage of increasing genetic gain due to greater selection accuracy, reduced cycle time, and increased number of individuals that can be evaluated. This strategy provides solutions to bottlenecks faced by conventional breeding methods, including long breeding cycles and difficulties to evaluate complex traits. Initial results from implementing GS in tropical forage grasses (TFGs) are promising with notable improvements over phenotypic selection alone. However, the practical impact of GS in TFG breeding programs remains unclear. The development of appropriately sized training populations is essential for the evaluation and validation of selection markers based on estimated breeding values. Large panels of single-nucleotide polymorphism markers in different tropical forage species are required for multiple application targets at a reduced cost. In this context, this review highlights the current challenges, achievements, availability, and development of genomic resources and statistical methods for the implementation of GS in TFGs. Additionally, the prediction accuracies from recent experiments and the potential to harness diversity from genebanks are discussed. Although, GS in TFGs is still incipient, the advances in genomic tools and statistical models will speed up its implementation in the foreseeable future. All TFG breeding programs should be prepared for these changes.
Thesagro: Brachiaria
Apomixia
Poliploidia
Gramínea
NAL Thesaurus: Apomixis
Marker-assisted selection
Polyploidy
Keywords: Seleção assistida
Seleção genômica
Language: Ingles
DOI: https://doi.org/10.3389/fpls.2021.665195
Type of Material: Artigo de periódico
Access: openAccess
Appears in Collections:Artigo em periódico indexado (CNPGL)

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