Selection of common cashew tree genotypes in commercial growing areas in municipalities of Piauí, Brazil

Filho, Carlos Humberto Aires Matos; Nunes, José Aírton Rodrigues; Lopes, Ângela Célis de Almeida; Gomes, Regina Lúcia Ferreira

doi:10.1590/1984-70332019v19n3a35

Cited by 5 publications

(1 citation statement)

References 12 publications

(13 reference statements)

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“…These results indicate that the selection should be made for the number of rooted mini-cuttings, an easily measured trait, with the possibility of satisfactory genotype selection gains, both between and within mate half-sibling progenies propagated by mini-cuttings. This is because the expected progress of selection depends directly on heritability (Resende 2016, Matos Filho et al 2019, and moderate to high estimates of heritability favor the initial selection among and within the best progenies (Carias et al 2016). Individual heritability estimates in the narrow sense of moderate (0.15 < h 2 < 0.50) to high (h 2 > 0.50) magnitudes have already been observed for the production of leaf mass (Simeão et al 2002), and those of high magnitude were noted for seedling height and diameter of mate progenies (Costa et al 2005).…”

Section: Resultsmentioning

confidence: 99%

Selection between and within half-sibling progenies of Ilex paraguariensis for adventitious rooting of mini-cuttings

Gazzana

Pimentel

Lohmann

et al. 2020

Crop Breed. Appl. Biotechnol.

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Section: Resultsmentioning

confidence: 99%

Selection between and within half-sibling progenies of Ilex paraguariensis for adventitious rooting of mini-cuttings

Gazzana

Pimentel

Lohmann

et al. 2020

Crop Breed. Appl. Biotechnol.

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Using morphometrics to distinguish the restinga and cerrado ecotypes of wild Anacardium occidentale (Anacardiaceae): a preliminary study in northeastern Brazil

Farias,

Mayo,

Vieira

et al. 2024

Plant Syst Evol

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The cashew tree Anacardium occidentale is a globally important food species and in Brazil is a natural component of cerrado and restinga vegetation and has an important role in local economies as a food and medicinal plant. Nevertheless, diversity studies of wild populations—the most important reservoir of natural variation—of this naturally widespread species are urgently needed for conservation strategies because of human impact on tropical American ecosystems where it occurs. Here, we sought to differentiate the previously recognized restinga and cerrado ecotypes using multivariate morphometrics of wild populations in a limited area of northeast Brazil (northern Piauí and northeastern Maranhão states). Thirty individuals were sampled for 47 vegetative and reproductive descriptors from six wild populations (three of each ecotype). Data analysis included principal component analysis and three classification methods (linear discriminant analysis, k-nearest neighbour analysis and classification and regression tree analysis); cross-validation tests were applied to classification results. Univariate statistics obtained for each population and ecotype were found to be consistent with the previously proposed distinction between the two ecotypes. Although principal component analysis showed extensive variation and overlap between populations, cross-validations of classification analyses showed strong differentiation between ecotypes and between most populations; vegetative and reproductive variables were equally important for discrimination. Cerrado populations were more variable and somewhat less distinct than restinga ones. New molecular genetic investigations of wild populations are needed to provide genetic support for the morphological differentiation of the ecotypes reported here.

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Estimation of the extent of phenotypic diversity among cashew (Anacardium occidentaleL.) genotypes based on agro-morphological and physicochemical traits

Matos-Filho

Carvalho-Junior²,

Costa³

et al. 2022

Plant Genet. Resour.

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Cashew (Anacardium occidentale L.) is cultivated in more than 30 countries because of its economic and nutritional importance. Despite having a significant agronomic role, little is known about the genetic and phenotypic diversity of cashew populations in Brazil. Thus, we aimed to characterize and estimate the diversity among cashew genotypes based on agro-morphological and physicochemical traits, with an objective of selection of varieties for breeding programmes. Forty-three cashew trees were evaluated based on 13 morphological traits and three physicochemical traits. A wide range of variations was recorded for the phenotypic characteristics, including total weight, fruit weight, pseudofruit length, kernel weight and total acidity, suggesting the existence of considerable variations for potential use in breeding programmes. Principal component analysis explained 79.74% of the total variation in the first two principal axes. The dendrogram based on the UPGMA method classified the 43 genotypes into six groups. Groups IV and VI were the most dissimilar, with emphasis on the genotypes 28 and 43, which were observed to be most divergent based on the Euclidean distance matrix (3.054). This makes it possible to select genotypes for hybridization with F1 generation gains. Based on cluster analysis and comparison of means among the six groups, promising genotypes were identified with superior traits, such as fruit weight, pseudofruit length, kernel weight and total acidity. This suggests the importance of phenotypic characterization for cashew breeding programmes. In addition, the observed vast diversity is an important genetic basis for improving cashew yield in northeastern Brazil.

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Selection of common cashew tree genotypes in commercial growing areas in municipalities of Piauí, Brazil

Cited by 5 publications

References 12 publications

Selection between and within half-sibling progenies of Ilex paraguariensis for adventitious rooting of mini-cuttings

Selection between and within half-sibling progenies of Ilex paraguariensis for adventitious rooting of mini-cuttings

Using morphometrics to distinguish the restinga and cerrado ecotypes of wild Anacardium occidentale (Anacardiaceae): a preliminary study in northeastern Brazil

Estimation of the extent of phenotypic diversity among cashew (Anacardium occidentaleL.) genotypes based on agro-morphological and physicochemical traits

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