Data/hora: 05/06/2024 03:46:24

Biblioteca(s): | Embrapa Milho e Sorgo.
Data corrente: | 18/12/2019
Data da última atualização: | 23/08/2020
Autoria: | SILVA, K. J.; GUIMARÃES, C. T.; GUILHEN, J. H. S.; GUIMARAES, P. E. de O.; PARENTONI, S. N.; TRINDADE, R. dos S.; OLIVEIRA, A. A. de; BERNARDINO, K. da C.; PINTO, M. de O.; DIAS, K. O. das G.; BERNARDES, C. de O.; DIAS, L. A. dos S.; GUIMARAES, L. J. M.; PASTINA, M. M.
Afiliação: | Karla Jorge Silva, Universidade Federal de Viçosa; CLAUDIA TEIXEIRA GUIMARAES, CNPMS; José Henrique Soler Guilhen, Universidade Federal do Espírito Santo; PAULO EVARISTO DE O GUIMARAES, CNPMS; SIDNEY NETTO PARENTONI, CNPMS; ROBERTO DOS SANTOS TRINDADE, CNPMS; Amanda Avelar de Oliveira, Escola Superior de Agricultura "Luiz de Queiroz"; Karine da Costa Bernardino, Universidade Federal de Viçosa; MARCOS DE OLIVEIRA PINTO, CNPMS; Kaio Olímpio das Graças Dias, Escola Superior de Agricultura "Luiz de Queiroz"; Carolina de Oliveira Bernardes, Universidade Federal do Espírito Santo; Luiz Antônio dos Santos Dias, Universidade Federal de Viçosa; LAURO JOSE MOREIRA GUIMARAES, CNPMS; MARIA MARTA PASTINA, CNPMS.
Título: | High-density SNP-based genetic diversity and heterotic patterns of tropical maize breeding lines.
Ano de publicação: | 2020
Fonte/Imprenta: | Crop Science, v. 60, p. 779-787, 2020
DOI: | 10.1002/csc2.20018
Idioma: | Inglês
Conteúdo: | Understanding the crop diversity is critical for a successful breeding program, helping to dissect the genetic relationship among lines and to identify superior parents. This study aimed to investigate the genetic diversity of maize inbred lines, and to verify the relationship between genetic diversity and heterotic patterns based on hybrid yield performance. A total of 1,041 maize inbred lines were genotyped-by-sequencing, generating 32,840 quality-filtered SNPs. Diversity analyses were performed using the Neighbor-Joining clustering method, which generated diversity groups. The clustering of lines based on the diversity groups was compared to the pre-defined heterotic groups using the additive genomic relationship matrix and UPGMA. Additionally, the genetic diversity of lines was correlated with yield performance of their corresponding 591 single-cross hybrids. The SNP-based genetic diversity analysis was efficient and reliable to assign lines within pre-defined heterotic groups. However, solely these genetic distances among inbred lines were not good predictors of the hybrid performance, once a low but significant Pearson?s correlation (0.22, p-value ? 0.01) was obtained between parental genetic distances and hybrids performance. Thus, SNP-based genetic distances provided important insights for effective parental selection, avoiding crossed between genetically similar tropical maize lines.
Thesagro: | Melhoramento Genético Vegetal; Milho; Variação Genética.
Thesaurus Nal: | Cluster analysis.
Categoria do assunto: | G Melhoramento Genético
Registro original: | Embrapa Milho e Sorgo (CNPMS)
Exemplares: | CNPMS - (29062-1) - UPC - AP - DD -  -  -  - DIS