Genetic divergence in cowpea genotypes with upright growth and early cycle

Dias, Francisco Tiago Cunha; Silva, Ana Paula Moura da; Bertini, Cândida Hermínia Campos de Magalhães

doi:10.12702/1984-7033.v09n03a07

Cited by 5 publications

(4 citation statements)

References 8 publications

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“…In this sense, crosses between the lines IT82D-889 and IT89KD-245, IT85F-1380 and IT89KD-245, and IT89KD-245 and IT98K-1092-1 appear to be promising. Dias et al (2009) assessed the genetic divergence between 28 cowpea lines from the germplasm bank of Universidade Federal do Ceará based on agronomic traits, and as well as in the present study, they observed that W100G was one of the most important traits contributing to genetic divergence. Oliveira et al (2003) evaluated the influence of nine phenotypic traits on grain yield per plant based on genetic correlations, and identified that the average NPP followed by W100G were the most important traits in the selection for cowpea grain yield.…”

Section: Discussionsupporting

confidence: 65%

Genetic divergence among African cowpea lines based on morphoagronomic traits

Costa

Damasceno‐Silva

Rocha³

et al. 2013

Genet. Mol. Res.

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ABSTRACT. The aim of this study was to estimate the genetic divergence between African cowpea lines from the Cowpea Germplasm Bank of Embrapa Meio-Norte, Brazil. The morphoagronomic diversity of 57 cowpea lines was assessed using multivariate analysis. The germplasm was evaluated in August 2009 using a randomized block design with three replications based on the following traits: number of pods per peduncle, pod length (PL), number of grains per pod (NGP), grain length (GRL), grain width, 100-grain weight (W100G), and yield. The heritability values of the traits PL, NGP, GRL, and W100G were all higher than 70%, indicating the possibility of genetic progress with selection. The crosses between the lines IT82D-889 and IT89KD-245, IT85F-1380 and IT89KD-245, and IT89KD-245 and IT98K-1092-1 could result in promising genetic combinations. The characteristics that contributed most to genetic divergence were W100G (49.7%), PL (16.7%), GRL (12.0%), and NGP (9.7%).

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Section: Discussionsupporting

confidence: 65%

Genetic divergence among African cowpea lines based on morphoagronomic traits

Costa

Damasceno‐Silva

Rocha³

et al. 2013

Genet. Mol. Res.

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“…Significant correlations of moderate to high magnitudes indicate the partial contribution of the traits to the total variability (Dias et al 2009). The first canonical variable (CV1) explained the largest portion of the total variation attributed to 100-seed weight, a trait that contributed the most to genetic divergence.…”

Section: Resultsmentioning

confidence: 99%

Agro-morphological characterization and genetic divergence assessment in bush snap bean genotypes1

Vaz

Júnior

Peixoto

2017

Pesqui. Agropecu. Trop.

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The characterization and identification of genetically divergent parents for crosses are important tasks in snap bean breeding programs, for a greater availability of cultivars to growers. This study aimed at characterizing bush snap bean genotypes originating from different countries; assessing the genetic divergence between the genotypes and the genetic variability extent, concerning 12 agro-morphological traits; and determining the relative importance of these traits for the genetic divergence. The experiment was conducted in a randomized complete block design, with 29 genotypes and four replications. The UPGMA and Tocher optimization methods, both based on the generalized distance of Mahalanobis, and the canonical variables method were used to analyze the genetic divergence. The genotypes exhibited a wide range of genetic variability for the agro-morphological traits evaluated, mainly for 100-seed weight, aspect and yield of commercial pods, plant height at harvest and pod weight. A high genetic divergence was detected between the genotypes, in which the 100-seed weight and aspect of commercial pods were the most important traits for clustering. Some genotypes own desirable characteristics for these and other traits, given the favorable genetic associations between traits. The snap bean genotypes originated from different countries tended to cluster together, indicating that similar germplasm is shared among different countries, thus suggesting a strong trans-national seed exchange.

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“…Mahalanobis distance (D 2 ) is an effective multivariate distance metrics that measure the distance between a distribution [14]. The inter-cluster distances between the accessions in clusters II and IV and clusters I and IV are highly diverse and this could be attributed to the diversity level of traits of these accessions.…”

Section: Discussionmentioning

confidence: 99%

Multivariate Analysis of Genetic Divergence in Amaranthus hybridus L.

2022

FJPAS

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Evaluation of genetic divergence among species of crop is crucial for selection process in plant breeding and for developing new and enhanced varieties with desirable characteristics. This research was done to study the genetic divergence in 10 accessions of Amaranthus hybridus so as to determine highly genetically divergent parents for high yielding hybrid. Ten accessions of Amaranthus hybridus were planted in plastic buckets with three replications. Data were recorded on nine quantitative traits and analyzed using principal component analysis and Mahanalobis D2 statistics, within and between cluster distances were calculated following the formular by Singh and Chaudhary. The analysis of variance indicated highly significant (P ˂ 0.01) variability among the 10 accessions of Amaranthus hybridus for the characters evaluated. The principal component analysis recorded 86.21% of the total variation among the 10 Amaranth accessions. The intra-cluster distances were zero in all the clusters which showed that there was no difference among the accessions within the clusters. The maximum inter-cluster distance of 97.95 was observed among accessions of clusters II and IV while minimum inter-cluster (32.05) was found between clusters III and IV. The accessions of cluster III had the highest desirable cluster mean for plant height, number of leaves and number of nodes. The accessions of cluster IV had the longest leaf length, petiole length, inflorescent height and number of seeds. Selection of accessions from divergent clusters and using them in hybridization programme could produce desirable hybrids and may lead to improvement of Amaranthus hybridus for yield and quality traits.

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Genetic divergence in cowpea genotypes with upright growth and early cycle

Abstract: -

Cited by 5 publications

References 8 publications

Genetic divergence among African cowpea lines based on morphoagronomic traits

Genetic divergence among African cowpea lines based on morphoagronomic traits

Agro-morphological characterization and genetic divergence assessment in bush snap bean genotypes1

Multivariate Analysis of Genetic Divergence in Amaranthus hybridus L.

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