Estimation of Genetic Diversity in Onion (&lt;i&gt;Allium cepa&lt;/i&gt; L.)

Akter, Mousumi; Biswas, Arindam; Siddique, S. S.; Hossain, S; Ivy, N. A.

doi:10.3329/agric.v13i1.26545

Cited by 8 publications

(10 citation statements)

References 1 publication

(1 reference statement)

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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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Section: Resultsmentioning

confidence: 99%

Section: ©Funpecmentioning

confidence: 99%

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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show abstract

“…Marka ISSR menggunakan primer tunggal yang pada bagian ujung 3' dan 5' terdapat penambahan sekuen nukleotida (Adeyose et al, 2012;Akter et al, 2015). Keunggulan ISSR antara lain: tidak dipengaruhi oleh kondisi lingkungan dan musim, tidak membutuhkan informasi sekuen terlebih dahulu, berbasis Polymerase Chain Reaction (PCR), DNA cetakan yang digunakan lebih sedikit (5-50 ng per reaksi), wilayah sekuen tersebar diseluruh genom sehingga menghasilkan pola polimorfisme lebih tinggi dibandingkan dengan teknik Random Amplified Polymorphic DNA (RAPD) dan dapat diaplikasi pada tingkat spesies (Son et al, 2012;Riupassa et al, 2015;Sulassih et al, 2013).…”

Section: Pendahuluanunclassified

“…Keragaman morfologi dan agronomi juga ditemukan pada 49 aksesi bawang merah asal Ethiopia yang memiliki variasi pada karakter tinggi tanaman, panjang daun, diameter umbi, bobot umbi dan umur panen (Degewione et al, 2011). Akter et al (2015) juga melaporkan 11 genotipe bawang merah asal India memiliki variasi morfologi pada karakter umbi dan daun.…”

Section: Keragaman Bawang Merah Berdasarkan Marka Morfologiunclassified