Genetic diversity in a germplasm collection of Brassica rapa subsp rapa
L. from northwestern Spain

Padilla, Guillermo Zermeño; Cartea, María Elena; Rodríguez, Víctor M.; Ordás, A.

doi:10.1007/s10681-005-0895-x

Cited by 46 publications

(53 citation statements)

References 27 publications

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“…Ward-MLM method allowed the formation of more compact clusters and heterogeneity between the groups; this was also obtained by Padilla et al (2005) who evaluated local varieties of Brassica rapa subsp rapa L., by Ortiz et al (2008) who examined accessions of maize, by Barbé et al (2010) who evaluated snap bean, and by Sudré et al (2010) who evaluated accessions of Capsicum spp.…”

Section: Genetic Diversitymentioning

confidence: 80%

Genetic diversity and selection gain in the physic nut (Jatropha curcas)

Brasileiro¹,

Silva²,

Souza³

et al. 2013

Genet. Mol. Res.

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ABSTRACT. The use of efficient breeding methods depends on knowledge of genetic control of traits to be improved. We estimated genetic parameters, selection gain, and genetic diversity in physic nut half-sib families, in order to provide information for breeding programs of this important biofuel species. The progeny test included 20 halfsib families in 4 blocks and 10 plants per plot. The mean progeny heritability values were: 50% for number of bunches, 47% for number of fruits, 35% for number of seeds, 6% for stem diameter, 26% for number of primary branches, 14% for number of secondary branches, 66% for plant height, and 25% for survival of the plants, demonstrating good potential for early selection in plant height, number of branches, and number of fruits per plant. In the analysis of genetic diversity, genotypes were divided into 4 groups. Genotypes 18, 19, 20, and 8 clustered together and presented the highest means for the vegetative characters and production. Lower means were observed in the 17, 12, 13, and 9 genotypes from the same group. We detected genetic variability in this population, with high heritability estimates and accuracy, demonstrating the possibility of obtaining genetic gains for vegetative characters and production at 24 months after planting.

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Section: Genetic Diversitymentioning

confidence: 80%

Genetic diversity and selection gain in the physic nut (Jatropha curcas)

Brasileiro¹,

Silva²,

Souza³

et al. 2013

Genet. Mol. Res.

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“…Ortiz et al (2008), working with 50 accessions of eight maize races from high-altitude regions in Peru, based on six agronomic descriptors, concluded that the Ward-MLM procedure produced an adequate genotype classification and that this analysis can be an additional refinement and a complement to the racial classification based on visual evaluation. Padilla et al (2005), in studying genetic diversity and morphological similarities of 120 local Brassica rapa subsp. rapa L. varieties, concluded that the use of the Ward-MLM strategy results in the formation of homogeneous groups.…”

Section: Resultsmentioning

confidence: 99%

Genetic variability in domesticated Capsicum spp as assessed by morphological and agronomic data in mixed statistical analysis

Sudré¹,

Gonçalves²,

Rodrigues³

et al. 2010

Genet. Mol. Res.

131

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Capsicum species are very important in Brazil because of economic, cultural and biological factors, and the country is considered to be a diversity center for this genus. Collection and maintenance of the genetic diversity in Capsicum are important to avoid genetic erosion. Besides the identification of species, the characterization and evaluation of accessions maintained in gene banks are of fundamental importance. For this purpose, multivariate methods have become an important tool in the classification of conserved genotypes. The objectives of this study were: i) to identify and characterize accessions of the Capsicum spp collection and draw conclusions about the potential use of certain accessions in different production sectors; ii) to estimate the genetic divergence among accessions using the Ward-MLM procedure, and iii) to evaluate the efficiency of the analysis of continuous and categorical data using the Ward-MLM procedure. Fifty-six Capsicum spp accessions were evaluated based on 25 descriptors, 14 of which were morphological and 11 agronomic. Based on the qualitative descriptors, it was possible to identify all species and, together with the agronomic descriptors, genotypes could be indicated with potential for use in various production sectors. Five was determined as the ideal number of groups by the criteria pseudo-F and pseudo-t 2 . The Ward-MLM procedure allowed the differentiation of the species C. annuum, C. frutescens, C. baccatum, and C. chinense in separate groups. The Ward-MLM procedure showed some level of efficiency in clustering Capsicum species analyzing morphological and agronomic data simultaneously.

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“…rapa L. and Capsicum spp. (Padilla et al, 2005;Ortiz et al, 2008;Barbé et al, 2010;Sudré et al, 2010;Cabral et al, 2010;). This technique is therefore an important statistical tool to be incorporated into sugarcane breeding programs to evaluate genetic diversity in germplasm banks, assisting in the definition of crossing strategies to increase efficiency in the generation of transgressive genotypes.…”

Section: Resultsmentioning

confidence: 99%