Title:	The Development of Thematic Core Collections in Cassava Based on Yield, Disease Resistance, and Root Quality Traits.
Authors:	SANTOS, C. C. dos ANDRADE, L. R. B. de CARMO, C. D. do OLIVEIRA, E. J. de
Affiliation:	CAROLINE CARDOSO DOS SANTOS, UNIVERSIDADE FEDERAL DO RECÔNCAVO DA BAHIA; LUCIANO ROGERIO BRAATZ DE ANDRADE; CÁTIA DIAS DO CARMO; EDER JORGE DE OLIVEIRA, CNPCA.
Date Issued:	2023
Citation:	Plants, MDPI AG, v.12, n.19, p.3474, 2023.
Description:	Thematic collections (TCs), which are composed of genotypes with superior agronomic traits and reduced size, offer valuable opportunities for parental selection in plant breeding programs. Three TCs were created to focus on crucial attributes: root yield (CC_Yield), pest and disease resistance (CC_Disease), and root quality traits (CC_Root_quality). The genotypes were ranked using the best linear unbiased predictors (BLUP) method, and a truncated selection was implemented for each collection based on specific traits. The TCs exhibited minimal overlap, with each collection comprising 72 genotypes (CC_Disease), 63 genotypes (CC_Root_quality), and 64 genotypes (CC_Yield), representing 4%, 3.5%, and 3.5% of the total individuals in the entire collection, respectively. The Shannon-Weaver Diversity Index values generally varied but remained below 10% when compared to the entire collection. Most TCs exhibited observed heterozygosity, genetic diversity, and the inbreeding coefficient that closely resembled those of the entire collection, effectively retaining 90.76%, 88.10%, and 88.99% of the alleles present in the entire collection (CC_Disease, CC_Root_quality, and CC_Disease, respectively). A PCA of molecular and agro-morphological data revealed well-distributed and dispersed genotypes, while a discriminant analysis of principal components (DAPC) displayed a high discrimination capacity among the accessions within each collection. The strategies employed in this study hold significant potential for advancing crop improvement efforts.
Thesagro:	Mandioca Recurso Genético Germoplasma Melhoramento Vegetal
NAL Thesaurus:	Manihot Breeding Genetic resources Germplasm
ISSN:	2223-7747
DOI:	10.3390/plants12193474
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPMF)