Breeding for pepper fruit quality: a genitical metabolomics approach
Wahyuni, Y. - \ 2014
Wageningen University. Promotor(en): Raoul Bino, co-promotor(en): Arnaud Bovy; E. Sudarmonowati; A.R. Ballester. - Wageningen : Wageningen University - ISBN 9789461739582 - 193
capsicum annuum - capsicum frutescens - capsicum chinense - capsicum baccatum - plantenveredeling - metabolomica - gewaskwaliteit - secundaire metabolieten - gezondheid - genetische kartering - rijp worden - capsicum annuum - capsicum frutescens - capsicum chinense - capsicum baccatum - plant breeding - metabolomics - crop quality - secondary metabolites - health - genetic mapping - ripening
A diverse collection of 32 pepper accessions was analysed for variation in health-related metabolites, such as carotenoids, capsaicinoids, flavonoids and vitamins C and E. For each of the metabolites analysed, there was a lot of variation among the accessions and it was possible to identify accessions with high amounts of specific metabolites. While all accessions contained high levels of vitamin C, accession C. chinenseAC2212 was found to be an excellent source of vitamin E, whereas C. annuumLong Sweet accumulated high levels of the flavonoid quercetin. A genetical metabolomics approach was used to study the genetic basis of metabolic traits in a segregating F2 population based on a cross between two contrasting pepper genotypes. This led to the identification of several metabolites QTL hotspots. The genetic basis for the accumulation of several flavonoids in pepper fruit was further investigated, by combining metabolic, gene expression and candidate gene-based marker data. This provided valuable insight into the key genes important for flavonoid accumulation in pepper fruit. The results of this study will help breeders to assist future breeding programs aimed at optimizing the levels of nutritional compounds in pepper fruit.
Integrated crop management of hot pepper (Capsicum spp.) in tropical lowlands
Vos, J.G.M. - \ 1994
Agricultural University. Promotor(en): J.C. Zadoks; H.D. Frinking. - S.l. : Vos - ISBN 9789054853176 - 188
bestrijdingsmethoden - plantenplagen - plantenziekten - geïntegreerde plagenbestrijding - geïntegreerde bestrijding - capsicum annuum - capsicum frutescens - spaanse pepers - tropen - subtropen - paprika - control methods - plant pests - plant diseases - integrated pest management - integrated control - capsicum annuum - capsicum frutescens - chillies - tropics - subtropics - sweet peppers
Hot pepper ( Capsicum spp.) is the most important low elevation vegetable commodity in Indonesia. Yields are low, in part due to crop health problems. Farmers' practices were surveyed by means of exploratory surveys. Hot pepper pests and diseases were identified and described. Components of integrated crop management (ICM) of hot pepper were investigated, such as plant raising practices during the nursery phase, and mulching and nitrogen fertilizing during the field phase. Experiments were carried out in the field at various locations in Indonesia and Malaysia and in growth chambers and greenhouses in the Netherlands. During the nursery phase, screen-covered nurseries protected plants from aphids and aphid-transmitted viruses. In the field phase, after transplanting, potted transplants showed better crop establishment than bare-root transplants and earlier harvesting. When plantlets were raised in screen-covered nurseries, a plant raising period of 1½ months appeared best for plant growth and earliness of harvesting after transplanting. In the field phase, white and silvery plastic mulches improved plant growth and earliness of fruiting, reduced virus infection and thrips injury, and improved crop production. Nitrogen fertilizing improved plant growth. Increasing nitrogen application rates aggravated anthracnose fruit rot and Cercospora leaf spot. Best yields were attained with nitrogen fertilization of 150 kg N/ha. The investigated components of ICM benefited crop production through, among others, improvement of crop health. The effects of the ICM components on yield were irrespective of cultivar or location.