|
|
|
|
|
| Albuquerque,Hilçana Ylka Gonçalves de; Oliveira,Eder Jorge de; Brito,Ana Carla; Andrade,Luciano Rogério Braatz de; Carmo,Cátia Dias do; Morgante,Carolina Vianna; Vieira,Eduardo Alano; Moura,Elisa Ferreira; Faleiro,Fábio Gelape. |
| ABSTRACT: Genetic redundancy in cassava (Manihot esculenta Crantz) presents a challenge to efficient management of genetic resources. This study aimed to identify and define the genetic structure of duplicates in cassava germplasm from various Embrapa research units, using single-nucleotide polymorphism (SNP) markers. We evaluated 2,371 accessions with 20,712 SNPs. The identification of duplicates was performed based on multilocus genotypes (MLG), adopting a maximum genetic distance threshold of 0.05. The population structure was defined based on discriminant analysis of principal components (DAPC). A total of 1,757 unique and 614 duplicate accessions were identified. The redundancy of the collections ranged from 17 % (Belém, PA – Brazil) to 39 %... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Manihot esculenta Crantz; Genotyping-by-sequencing; Multilocus; Genetic resources. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019001400328 |
| |
|
|
| Carmo,Cátia Dias do; Silva,Maiane Suzarte da; Oliveira,Gilmara Alvarenga Fachardo; Oliveira,Eder Jorge de. |
| The geminivirus complex known as cassava mosaic disease (CMD) is one of the most devastating viruses for cassava (Manihot esculenta Crantz). The aim of this study was to use molecular-assisted selection (MAS) to identify CMD-resistant accessions and ascertain promising crosses with elite Brazilian varieties. One thousand two hundred twenty-four accessions were genotyped using five molecular markers (NS169, NS158, SSRY028, SSRY040 and RME1) that were associated with resistance to CMD, along with 402 SNPs (single-nucleotide polymorphism). The promising crosses were identified using a discriminant analysis of main component (DAPC), and the matrix of genomic relationship was estimated with SNP markers. The CMD1 gene, previously described in M. glaziovii, was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Manihot esculenta; Breeding; Disease; Virus. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000600520 |
| |
|
|
|
