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Stuttgart, Germany

Montes J.M.,JatroSelect GmbH | Technow F.,University of Hohenheim | Martin M.,JatroSelect GmbH | Becker K.,JatroSolutions GmbH
Diversity | Year: 2014

Jatropha curcas L. (jatropha) is an undomesticated plant that has recently received great attention for its utilization in biofuel production, rehabilitation of wasteland, and rural development. Knowledge of genetic diversity and marker-trait associations is urgently needed for the design of breeding strategies. The main goal of this study was to assess the genetic structure and diversity in jatropha germplasm with co-dominant markers (Simple Sequence Repeats (SSR) and Single Nucleotide Polymorphism (SNP) in a diverse, worldwide, germplasm panel of 70 accessions. We found a high level of homozygosis in the germplasm that does not correspond to the purely outcrossing mating system assumed to be present in jatropha. We hypothesize that the prevalent mating system of jatropha comprise a high level of self-fertilization and that the outcrossing rate is low. Genetic diversity in accessions from Central America and Mexico was higher than in accession from Africa, Asia, and South America. We identified makers associated with the presence of phorbol esters. We think that the utilization of molecular markers in breeding of jatropha will significantly accelerate the development of improved cultivars. © 2014 by the authors. Source

Montes J.M.,JatroSelect GmbH | Technow F.,University of Hohenheim | Bohlinger B.,University of Hohenheim | Becker K.,JatroSelect GmbH | And 2 more authors.
Industrial Crops and Products | Year: 2013

Jatropha curcas L. (JCL) is an important energy plant which has received great attention in recent years for its utilization in biodiesel production and its high potential for greening and rehabilitation of wastelands. Breeding, farming and industrial processing of JCL need rapid and efficient methods to determine quality parameters associated with the value of the oil, press cake and biodiesel. Wet chemistry analyses are time consuming and expensive and near-infrared spectroscopy (NIRS) might be a suitable method for the analysis of large numbers of samples. Our main goal was to investigate the potential of NIRS to determine grain quality parameters in bulk JCL samples. We concluded that NIRS has a high potential for determining concentrations of oil, protein, ash, stearic, oleic, linoleic, linolenic and arachidic acids in the kernel fraction of JCL grains. The precision of NIRS-based phorbol ester determination could be improved by excluding samples with phorbol ester <0.1mgg -1. NIRS-based prediction of shell quality traits proved to be less accurate than for kernel traits. © 2012 Elsevier B.V. Source

The present invention relates to a method for detoxifying plant constituents from

Senger E.,JatroSolutions GmbH | Martin M.,JatroSolutions GmbH | Dongmeza E.,JatroSelect Cameroon | Montes J.M.,JatroSolutions GmbH
Biomass and Bioenergy | Year: 2016

Jatropha curcas L. (jatropha) is a perennial plant with a high untapped potential towards sustainable production of food and bioenergy. The transformation of jatropha into a competitive crop requires intensive breeding efforts. The objectives of our study were to (i) assess genetic variation of agronomic and quality traits in different environments, (ii) investigate genotype by environment interactions, and (iii) discuss potential selection strategies. Agronomic and quality traits were assessed on 277 jatropha genotypes that were evaluated over three environments in Cameroon. Genetic variation and heritability of agronomic and quality traits showed excellent prospects to select and breed improved cultivars rapidly. Selection for accumulated seed yield over years seems to be the best choice to increase annual seed and oil yield. Seed yield per month might be incorporated in selection indices to improve the efficiency of fruit harvesting. Selection based on a single testing environment was always inferior to the selection based on multiple environments. The magnitude of genotype by environment interaction (GxE) in jatropha is large. Therefore, testing in multiple environments is a requirement to select improved cultivars with local and broad adaptation. © 2016 Elsevier Ltd. Source

Montes J.M.,JatroSelect GmbH | Technow F.,University of Hohenheim | Bohlinger B.,University of Hohenheim | Bohlinger B.,JatroSolutions GmbH | And 3 more authors.
Industrial Crops and Products | Year: 2013

Jatropha curcas L. (jatropha) has recently received great attention for its utilization in biofuel production, rehabilitation of wasteland and rural development. Improvement of seed quality is an important breeding goal but jatropha seed quality has been investigated with sample sets comprising a small number of traits, accessions and environments. Our main goal was to investigate a large number of traits in a wide and geographical diverse collection of seed samples to have a comprehensive view on the phenotypic variation of seed quality in jatropha. Our objectives were to (i) assess phenotypic variation of jatropha seed quality traits, (ii) investigate the association among those traits (iii) group germplasm and (iv) examine the partition of the trait variation attributed to factors of geographical origin (world regions and countries) and sampling procedures (single seeds vs. seed samples). Phenotypic variation was larger than reported previously. We detected a strong positive association between seed weight and the contents of oil in seed and kernel. Oil content in seed was negatively associated with the ratio of shell weight to seed weight. Contents of oil and protein in kernel were also associated negatively. Accessions from Africa and Central and North America grouped together and separated of accessions from Asia and South America. Countries and accessions within countries contributed most to the total variance of seed quality traits. Determination of seed quality among accessions using seed samples is more efficient than using single seeds. © 2013 Elsevier B.V. Source

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