Data/hora: 20/06/2024 11:38:12

Biblioteca(s): | Embrapa Hortaliças.
Data corrente: | 11/01/2022
Data da última atualização: | 11/01/2022
Autoria: | CUNHA, C. P. da; RESENDE, F. V.; ZUCCHI, M. I.; PINHEIRO, J. B.
Afiliação: | CAMILA PINTO DA CUNHA, UNICAMP; FRANCISCO VILELA RESENDE, CNPH; MARIA IMACULADA ZUCCHI, UNICAMP; JOSE BALDIN PINHEIRO, APTA.
Título: | SSR-based genetic diversity and structure of garlic accessions from Brazil.
Ano de publicação: | 2014
Fonte/Imprenta: | Genetica, v. 142, n. 5, p. 419-431, 2014.
DOI: | 10.1007/s10709-014-9786-1
Idioma: | Inglês
Conteúdo: | Garlic is a spice and a medicinal plant; hence, there is an increasing interest in ?developing? new varieties with different culinary properties or with high content of nutraceutical compounds. Phenotypic traits and dominant molecular markers are predominantly used to evaluate the genetic diversity of garlic clones. However, 24 SSR markers (codominant) specific for garlic are available in the literature, fostering germplasm researches. In this study, we genotyped 130 garlic accessions from Brazil and abroad using 17 polymorphic SSR markers to assess the genetic diversity and structure. This is the first attempt to evaluate a large set of accessions maintained by Brazilian institutions. A high level of edundancy was detected in the collection (50 % of the accessions represented eight haplotypes). However, non-redundant accessions presented high genetic diversity. We detected on average five alleles per locus, Shannon index of 1.2, HO of 0.5, and HE of 0.6. A core collection was set with 17 accessions, covering 100 % of the alleles with minimum redundancy. Overall FST and D values indicate a strong genetic structure within accessions. Two major groups identified by both model-based (Bayesian approach) and hierarchical clustering (UPGMA dendrogram) techniques were coherent with the classification of accessions according to maturity time (growth cycle): early-late and midseason accessions. Assessing genetic diversity and structure of garlic collections is the first step towards an efficient management and conservation of accessions in genebanks, as well as to advance future genetic studies and improvement of garlic worldwide.
Thesagro: | Alho; Allium Sativum; Germoplasma; Marcador Molecular.
Thesaurus Nal: | Cluster analysis; Genetic resources; Microsatellite repeats.
Categoria do assunto: | --
Registro original: | Embrapa Hortaliças (CNPH)
Exemplares: | CNPH - (41674-1) - UPC - AP - DD -  -  -  - DIS