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The objective of this paper was to measure resistance to Puccinia coronata f.sp. avenae (Pca) in a set of 63 previously uncharacterised new and historical oat cultivars representing 120 years of Polish oat breeding. The distinctiveness of the obsolete and modern gene pools led to the expectation that the earlier cultivars could be a valuable source of useful resistance genes discarded during subsequent breeding. The plant material was tested at the seedling stage using 14 Pca pathotypes and at t...
Breeding drought tolerance in groundnuts cultivars would reduce yield losses due to drought stress in rain-fed growing areas. The mode of gene action governing the inheritance of drought tolerance and secondary traits was investigated by mating 30 lines according to North Carolina design II scheme. The parents and resulting 75 F2 progenies were grown in a split plot arrangement using an alpha lattice design, with two replications under drought and non-stressed environments for two seasons. The t...
Orobanche spp. (broomrape) is an obligate root parasite that can attack a wide spectrum of plants, including tobacco. It has been responsible for economic losses in Europe since 2002 and its incidence in many tobacco-growing countries is increasing. Preventive and curative methods exist, including the use of agrochemicals, however efficacy is limited and pest dissemination remains important due to a high rate of multiplication of the parasite and very small long lasting seeds. The tobacco variet...
Vertcillium wilt (VW, Verticillium dahliae Kleb.) is one of the most important soil-borne fungal diseases affecting world cotton production. Numerous studies have been conducted to investigate the genetic basis of VW resistance using bi-parental or association mapping populations. In this study, a multi-parent advanced generation inter-cross (MAGIC) population of 550 recombinant inbred lines (RILs) together with their 11 Upland cotton parents with a total of 473,516 polymorphic SNP markers was u...
The “shell thickness” gene (Sh) controls three fruit types in African oil palm [Elaeis guineensis (Eg)] and has important implementations for variety development. Eg plantations in South and Central America suffer severally from the “Pudricion de Cogollo” disease, leading to the development of hybrid varieties between African and American oil palm [E. oleifera (Eo)]. We have analysed the allelic variation of a 237 bp amplicon within the Sh gene in Eo, interspecific hybrids and Eg pisifera access...
The increasing severity and prevalence of powdery mildew aided by extensive use of semi-dwarf cultivars and high levels of nitrogenous fertilizers are causing significant yield losses in wheat. Resistant cultivars are the most cost-effective and environmentally friendly approach to manage the disease. The objective of this study was to identify quantitative trait loci (QTL) for powdery mildew resistance in a doubled haploid (DH) population from a cross between leading Chinese cultivars, Yangmai ...
Breeding value refers to the ability of a genotype to produce superior progenies when crossed with other genotypes and are used to predict the performance of a genotype as a parent in plant and animal breeding. The objectives of this study were to estimate the breeding values of genotypes for cane yield, to determine the proportions of elite female and male parents, and evaluate their implications for sugarcane breeding. Families produced from crossing were planted in field trials using a random...
The brown planthopper (Nilaparvata lugens Stal; BPH) is the most destructive rice pests worldwide. Identification and application of major resistance genes and cultivation of resistant varieties are the most efficient methods to control this insect. In this study, the rice variety, ARC5984, was detected to be highly resistant to BPH due to the presence of a major resistance gene, which has primarily been mapped in a 6-cM region on the long arm of chromosome 4. Fine mapping of the resistance gene...
An optimal number of test locations and replications in yield trials allows improvements in the efficiency of a breeding program and selection reliability. The objectives of this study were to verify the optimal number of test locations and replications per test location in edaphoclimatic regions (ECR) and macroregions (MRs) of soybean adaptation in Brazil. Grain yield data from 184 soybean trials in 57 locations was evaluated in crop seasons 2012–2013 to 2015–2016. The number of replications cu...
Cynara cardunculus L., member of the Asteraceae family, includes three botanical varieties, fully-inter-fertile: scolymus (globe artichoke), altilis (cultivated cardoon) and sylvestris (wild cardoon).The artichoke production is traditionally carried out through vegetative propagation using offshoots or suckers. However, several new seed propagated cultivars have been developed in recent years, which showed high yield and ruled out phytosanitary problems inherent to vegetative propagation. In thi...
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