Assessing the genetic diversity in onion (<i>Allium cepa</i>L.) landraces from northwest Spain and comparison with the European variability

Rivera, Antonio; Giménez, Cristina Mallor; Garcés-Claver, Ana; García-Ulloa, Alba; Pomar, Federico; Silvar, Cristina

doi:10.1080/01140671.2016.1150308

Cited by 23 publications

(24 citation statements)

References 45 publications

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“…This correlation matrix overall summarized, that bulb size and phenol content has direct positive correlation with onion bulb yield. Similar findings reported by Singh et al, (2013), Raghuwanshi et al, (2016), Rivera et al, (2016) to identify the desirable parents so as to be utilized in onion breeding program for varietal development.…”

Section: Genetic Correlationsupporting

confidence: 82%

Genetic Diversity in Onion by Multivariate Analysis under Short Day Condition

Ghodke¹,

Gijare²,

Andhale³

et al. 2018

Int.J.Curr.Microbiol.App.Sci

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Section: Genetic Correlationsupporting

confidence: 82%

Genetic Diversity in Onion by Multivariate Analysis under Short Day Condition

Ghodke¹,

Gijare²,

Andhale³

et al. 2018

Int.J.Curr.Microbiol.App.Sci

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“…Despite the onion genotypes narrow genetic base, González have observed divergence between groups of genotypes using UPGMA algorithms. As well, Tocher method have been satisfactorily applied to expose the divergence between groups of genotypes (Akter et al, 2015;Khosa and Dhatt, 2015;Rivera et al, 2016). Crossing methods used in onion populations groups were separated at 70% dissimilarity; the threshold was established at the point of rupt change in the dendrogram branches, as recommended by Cruz et al (2012).…”

Section: Resultsmentioning

confidence: 99%

“…the onion genotypes narrow genetic base, González-Pérez et al (2015) also have observed divergence between groups of genotypes using UPGMA algorithms. As well, Tocher method have been satisfactorily applied to expose the divergence between groups of genotypes (Akter et al, 2015;Khosa and Dhatt, 2015;Rivera et al, 2016).…”

Section: ©Funpecmentioning

confidence: 99%

“…UPGMA dendrogram of 11 onion genotypes derived from three crossing methods (A1: self-fertilization of a plant, B2: intercrossing of two plants and C3: intercrossing of three plants), obtained by Euclidian distance Subtitle: Genotype 1, 2 and 3= GRxGR; Genotype 4, 5 and 6= 2; Genotype 13, 14 and 15= BUC; 1; Genotype 22, 23 and 24= GRxBOT 4; Genotype 31, 32 and 33= By examining, the UPGMA dendrogram in Figure 1 is possible observe that Groups II was made up by GRxBOT CRxBOT-1, IP-1 and BUC 2 and group VII by IP Pérez et al (2015) also have observed divergence between groups of genotypes using UPGMA algorithms. As well, Tocher method have been satisfactorily applied to expose the divergence between groups of genotypes (Akter et al, 2015;Khosa and Dhatt, 2015;Rivera et al, 2016).…”

Section: ©Funpecmentioning

confidence: 99%

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Research Article Genetic divergence between onion populations derived from three different crossing methods

Machado¹,

Freitas²,

Luz³

et al. 2019

Genet. Mol. Res.

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The production of onion hybrids depends on the development of genetically pure lineages. Successive selffertilization guarantees obtaining endogenous lines quickly. However, onion undergoes a strong process of inbreeding depression when self-fertilized for several generations, which reduces plant vigor, bulb size and seed production, increasing the cost to produce hybrid seed. An estimate of the genetic distance between genotypes is a way of predicting if genetic variability is being maintained. We evaluated possible negative effects in populations due to selffertilization, compared to interbreeding between two or three plants. Eleven onion populations in different genetic segregation stages, obtained from generations that already had low or moderate inbreeding levels were included. The populations were from the breeding program of Bayer Vegetable Seeds. In order to assess the agronomic descriptors contribution for the genetic divergence, three types of crossing methods of populations were performed: selffertilization of plants, crossing between two plants and crossings between three plants, during two consecutive years (2014 and 2015). Morphological differences were detected through dissimilarity measures. The traits bulbs/plot (28.32%), fruit fixation (13.12%) and seed weight/umbel (13.41%) together contributed 54.85% to the D.L.M. Machado et al. 2 divergence of onion genotypes. The crosses between two and three plants provided greater divergence among the genotypes, compared to self-fertilization. Economically important traits such as bulb production per plot, fruit fixation, resistance to disease caused by Alternaria porri (Pleosporaceae) and seed weight per umbel can be measured to assess divergence for appropriate selection of onion lineages among segregant populations.

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“…The modern varieties were derived from heirloom varieties maintained within traditional farming systems. These varieties form open-pollinated, heterozygote, and heterogeneous populations [7]. Korea, Japan, USA, and many countries around the globe developed open-pollinated, short duration, and early spring type to summer type onion varieties.…”

Section: Introductionmentioning

confidence: 99%

Varietal Identification of Open-Pollinated Onion Cultivars Using a Nanofluidic Array of Single Nucleotide Polymorphism (SNP) Markers

Lee¹,

Robin

Natarajan

et al. 2018

Agronomy

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Onions (Allium cepa L.) are a medicinally and economically important vegetable species rich in sulphur compounds, polyphenols, and antioxidants. In Korea, most of the onion cultivars are of the open-pollinated, heterozygous, short duration, and early spring type, which are generally harvested in April. Precise varietal identification is crucially important to warrant the authenticity of supreme onion genotypes, which aid in affirming the genetic identity of breeding materials at both the breeders and farmers levels. A set of markers identified from the double-digest restriction-site associated DNA sequencing (ddRAD-seq) database of Allium cepa L. and involving single nucleotide polymorphisms (SNPs) were deployed for genotyping deoxyribonucleic acid (DNA) samples extracted from seven genetically diverse onion cultivars collected in Korea and Japan. The validation process led us to designating 43 SNPs out of 48 that unequivocally identified all seven genotypes with high statistical validity (p < 0.001). Phylogenetic relationships and varietal identity among the cultivars were ascertained by Bayesian clustering and ordination analyses. Two genotypes, Singsingball and Taegeukhwang of Korean origin, showed a greater genetic distance from the five other onion cultivars. The SNP markers deployed in this study effectively authenticated the DNA fingerprints of the early spring onion cultivars utilizing a high-throughput genotyping protocol. The method exploited in this study provides an efficient pathway of verifying genetic identity of onion genotypes for their quality control. The markers developed are highly useful in the management and conservation of elite onion breeding materials at the farmers’ level.

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Assessing the genetic diversity in onion (Allium cepaL.) landraces from northwest Spain and comparison with the European variability

Cited by 23 publications

References 45 publications

Genetic Diversity in Onion by Multivariate Analysis under Short Day Condition

Genetic Diversity in Onion by Multivariate Analysis under Short Day Condition

Research Article Genetic divergence between onion populations derived from three different crossing methods

Varietal Identification of Open-Pollinated Onion Cultivars Using a Nanofluidic Array of Single Nucleotide Polymorphism (SNP) Markers

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