E.J. Oliveira
Cleaning cassava genotypes infected with cassava frogskin disease via in vitro shoot tip culture
This study aimed to develop a methodology for eliminating cassava frogskin disease (CFSD) from in vitro shoot tip culture by associating thermotherapy and tetracycline. Cuttings from different accessions (BGM0232, BGM0315, BGM0464, BGM584, BGM0841, and BGM1342), infected with CFSD according to visual inspection of the disease symptoms, were used for cleaning. To ver.. Read More»
Genet. Mol. Res. 16(2): gmr16029556
DOI: 10.4238/gmr16029556
Inducing autotetraploids in cassava using oryzalin and colchicine and their in vitro morphophysiological effects
Polyploid induction has been used for plant breeding to produce bigger and more robust plants than diploid types. The present study aimed to develop a methodology for in vitro induction of polyploidy in cassava. Apical and lateral microcuttings from the BRS Formosa variety were treated with six oryzalin concentrations for 24 and 48 h. The same methodology was used for colchicine with different .. Read More»
Genet. Mol. Res. 15(2): gmr.15028281
DOI: 10.4238/gmr.15028281
Variation in cassava germplasm for tolerance to post-harvest physiological deterioration
Tolerant varieties can effectively control post-harvest physiological deterioration (PPD) of cassava, although knowledge on the genetic variability and inheritance of this trait is needed. The objective of this study was to estimate genetic parameters and identify sources of tolerance to PPD and their stability in cassava accessions. Roots from 418 cassava accession.. Read More»
Genet. Mol. Res. 15(2): gmr.15027818
DOI: 10.4238/gmr.15027818
Polymorphism of starch pathway genes in cassava
The distribution and frequency of single nucleotide polymorphisms (SNPs) can help to understand changes associated with characteristics of interest. We aimed to evaluate nucleotide diversity in six genes involved in starch biosynthesis in cassava using a panel of 96 unrelated accessions. The genes were sequenced, aligned, and used to obtain values for nucleotide div.. Read More»
Genet. Mol. Res. 15(4): gmr15049082
DOI: 10.4238/gmr15049082
Genetic parameters and prediction of genotypic values for root quality traits in cassava using REML/BLUP
The aim of this study was to estimate the genetic parameters and predict the genotypic values of root quality traits in cassava (Manihot esculenta Crantz) using restricted maximum likelihood (REML) and best linear unbiased prediction (BLUP). A total of 471 cassava accessions were evaluated over two years of cultivation. The evaluated traits included amylose.. Read More»
Genet. Mol. Res. 13(3): 2014.August.28.13
DOI: 10.4238/2014.August.28.13
New accuracy estimators for genomic selection with application in a cassava (Manihot esculenta) breeding program
Genomic selection is the main force driving applied breeding programs and accuracy is the main measure for evaluating its efficiency. The traditional estimator (TE) of experimental accuracy is not fully adequate. This study proposes and evaluates the performance and efficiency of two new accuracy estimators, called regularized estimator (RE) and hybrid estimator (HE.. Read More»
Genet. Mol. Res. 15(4): gmr.15048838
DOI: 10.4238/gmr.15048838
Classification of cassava genotypes based on qualitative and quantitative data
We evaluated the genetic variation of cassava accessions based on qualitative (binomial and multicategorical) and quantitative traits (continuous). We characterized 95 accessions obtained from the Cassava Germplasm Bank of Embrapa Mandioca e Fruticultura; we evaluated these accessions for 13 continuous, 10 binary, and 25 multicategorical traits. First, we analyzed the accessions based only on q.. Read More»
Genet. Mol. Res. 14(1): 2015.February.2.14
DOI: 10.4238/2015.February.2.14
Phenotypic diversity of starch granules in cassava germplasm
Demand for the development of cassava varieties with different native starches has guided the search for these characteristics in the germplasm of Manihot esculenta Crantz. Therefore, the objective of this study was to estimate the genetic diversity of cassava accessions for root and starch granule characteristics to guide the future industrial application of this s.. Read More»
Genet. Mol. Res. 16(2): gmr16029276
DOI: 10.4238/gmr16029276
Adaptability and stability analysis of the juice yield of yellow passion fruit varieties
This study analyzed the genotype x environment interaction (GE) for the juice productivity (JuProd) of 12 yellow passion fruit varieties (Passiflora edulis Sims. f. flavicarpa Deg.) using additive main effects and multiplicative interaction (AMMI) model and auxiliary parameters. The experiments were conducted in eight environments of Bahia State, B.. Read More»
Genet. Mol. Res. 13(3): 2014.August.26.2
DOI: 10.4238/2014.August.26.2
Development of a cassava core collection based on single nucleotide polymorphism markers
Single nucleotide polymorphism (SNP) markers were used in the largest cassava (Manihot esculenta Crantz) germplasm collection from Brazil to develop core collections based on the maximization strategy. Subsets with 61, 64, 84, 128, 256, and 384 cassava accessions were selected and named PoHEU, MST64, PoRAN, MST128, MST256, and MST384, respectively. All the .. Read More»
Genet. Mol. Res. 13(3): 2014.August.25.11
DOI: 10.4238/2014.August.25.11
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