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52 results for “Vicia faba”

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zenodo40/100

Developing a new genic SSR primer database for Vicia faba molecular breeding

Accelerating breeding programs require the use of efficient molecular tools and enhance the diversity of local faba bean cultivars. The aim of this study is to develop a new genetic database of available SSR primers, to classify these PCR primers according to the target genes and their respective cell processes, to assess the diversity and efficacy of the microsatellite markers applied to faba bean and to study the genetic structure of some selected faba bean cultivars. Approximately 75,605 and 148,196 previously published genomic and transcriptomic sequences were used to detect possible simple sequence repetitions in faba genomic content. The number of identified SSRs was 25502 and 12319, where the distribution to different repeat type classes shows that, the trinucleotide was the highest number of repeat counts followed by dinucleotide repeats. These genic SSR sequences were used to design 1091 PCR primers, out of which only 238 (21.8%) primers target genomic sequences and the other 853 PCR primers target transcriptomic sequences. The annotation of gene-targeted SSRs has shown that approximately 897 genes are targeted through our designed SSR primers. About 1890 gene ontology (GO) identification code has been obtained. The GOs keywords distributed between distinct cell molecular features, where the highest amount of redundant sentences is the technical word, domain and molecular feature phrases with 554, 196 and 160 GOs, respectively. These GOs belong to the general level of gene ontology, such as molecular function, cellular component and biological process with 544, 670 and 676 GOs, respectively. Twenty-seven SSR PCR primers were synthesized to genotype 12 Egyptian faba bean genotypes. About 11 SSR gave from 1 to 2 PCR bands, other gave only one sharp band with polymorphic band size. The number of polymorphic primers was 13 primers. The polymorphic mean polymorphism information content was 0.3 which implies moderate informativeness.

opencc-by-4.0Jan 2020View details →

dryad40/100

Responsiveness of the broad bean weevil Bruchus rufimanus Boh. to different Vicia faba L. genotypes

The broad bean weevil Bruchus rufimanus Boh., also called bruchid beetle, is a major pest of Vicia faba L. given that larvae develop inside the seeds causing direct quality losses in agricultural products. Recurrent chemical applications are inappropriate because they represent a serious threat to pollinators in general. In addition, biological control approaches that have been attempted so far showed limited effectiveness, which makes studies of methods to control bruchid populations extremely important. Breeding resistant cultivars is the most adequate approach to achieve efficient levels of pest resistance and promote sustainable agriculture. To explore the mechanisms underlying bruchid resistance, we explored B. rufimanus behavior in different life stages and plant preference in feeding, oviposition and larval survival into adulthood both in greenhouse experiments and in the field. Our greenhouse results showed that females, compared to males, have preferences for flowers from some genotypes over the others although the choices made did not correspond with the laying preference. The egg laying preference of females was significantly affected by cultivars. This attraction could be explained by the number of seeds per pod produced by the genotypes, while in the field flowering time influenced bruchid infestation. Moreover, the survival of the larva into adulthood was greater in certain genotypes over the others. The results of our study lay the groundwork for further analyses to finely dissect V. faba resistance towards bruchids and pave the way for the development of methods to predict potential resistant genotypes in research and breeding programs.

opencc-zeroApr 2024View details →

zenodo40/100