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Author: Michael Dossett Publisher: ISBN: Category : Anthocyanins Languages : en Pages : 146
Book Description
In recent years, there has been renewed interest in black raspberry (Rubus occidentalis L.) breeding. This has been spurred by an increase in black raspberry consumption due to studies that have shown them to be particularly high in anthocyanin content indicating high levels of antioxidants. Present cultivars are ill adapted to the biotic and abiotic stresses of the Pacific Northwest, where the commercial black raspberry industry is centered, and fields must be replanted after 3-5 seasons. An incomplete, partial diallel, consisting of 10 parents (eight cultivars, a wild selection, and a bulk pollen sample from R. leucodermis Dougl. ex Torr. & Gray) and 26 sibling families, was constructed for the study of variation and inheritance of vegetative, reproductive and fruit chemistry traits in black raspberry. Sibling families of one to eight plants were established at the Oregon State University Lewis Brown Farm in Corvallis, Oregon, and were arranged as a randomized complete block design with four blocks. Phenological development and vegetative measurements were recorded for each plant in 2005 and 2006. In addition, 25 berry samples of ripe fruit were collected from each plant, and pooled by family within blocks, to study variation in fruit chemistry properties including pH, titratable acidity, soluble solids, anthocyanin profiles, and total anthocyanins. Although there were many striking similarities, strong trends in phenotype based on pedigree were observed for most traits indicating a strong genetic component. For all traits, except for fruit mass, general combining ability effects were significant and larger than specific combining ability effects. Narrow-sense heritability estimates were generally moderate to high when year effects were excluded from the analysis, indicating the potential for progress from careful breeding and selection within the population of plants studied. Most of the observed variability, however, was limited to a small number of the studied genotypes, suggesting a degree of limitation for selection in the present germplasm base.
Author: Michael Dossett Publisher: ISBN: Category : Anthocyanins Languages : en Pages : 146
Book Description
In recent years, there has been renewed interest in black raspberry (Rubus occidentalis L.) breeding. This has been spurred by an increase in black raspberry consumption due to studies that have shown them to be particularly high in anthocyanin content indicating high levels of antioxidants. Present cultivars are ill adapted to the biotic and abiotic stresses of the Pacific Northwest, where the commercial black raspberry industry is centered, and fields must be replanted after 3-5 seasons. An incomplete, partial diallel, consisting of 10 parents (eight cultivars, a wild selection, and a bulk pollen sample from R. leucodermis Dougl. ex Torr. & Gray) and 26 sibling families, was constructed for the study of variation and inheritance of vegetative, reproductive and fruit chemistry traits in black raspberry. Sibling families of one to eight plants were established at the Oregon State University Lewis Brown Farm in Corvallis, Oregon, and were arranged as a randomized complete block design with four blocks. Phenological development and vegetative measurements were recorded for each plant in 2005 and 2006. In addition, 25 berry samples of ripe fruit were collected from each plant, and pooled by family within blocks, to study variation in fruit chemistry properties including pH, titratable acidity, soluble solids, anthocyanin profiles, and total anthocyanins. Although there were many striking similarities, strong trends in phenotype based on pedigree were observed for most traits indicating a strong genetic component. For all traits, except for fruit mass, general combining ability effects were significant and larger than specific combining ability effects. Narrow-sense heritability estimates were generally moderate to high when year effects were excluded from the analysis, indicating the potential for progress from careful breeding and selection within the population of plants studied. Most of the observed variability, however, was limited to a small number of the studied genotypes, suggesting a degree of limitation for selection in the present germplasm base.
Author: Michael Dossett Publisher: ISBN: Category : Black raspberries Languages : en Pages : 143
Book Description
In recent years, there has been renewed interest in black raspberry (Rubus occidentalis L.) breeding. This has been spurred, in part, by an increase in black raspberry consumption due to studies that have shown them to be particularly high in anthocyanin content indicating high levels of antioxidants. Present cultivars are ill adapted to the biotic and abiotic stresses of the Pacific Northwest, where the commercial black raspberry industry is centered, and fields must be replanted after 3-5 seasons. Breeding progress in black raspberry has been limited by a lack of genetic diversity. This work is the first documented effort to systematically collect and evaluate wild R. occidentalis germplasm from across the native range of the species. Sources of strong resistance to the virus vector Amphorophora agathonica Hottes were identified from Maine, Michigan, and Ontario. Populations with outstanding vigor and possible resistance to Verticillium wilt were identified, as were two populations with a novel anthocyanin profile. In addition, variation was documented for morphological traits such as thorniness and cane architecture as well as fruit weight and gloss, and ripening times. Molecular analysis of genetic diversity using microsatellite markers in these populations showed that black raspberry cultivars are closely related to each other, but there is tremendous diversity in the wild populations. The data also support phenotypic evidence that several "wild" populations may be descended from feral cultivated plants. Overall, genetic diversity in wild black raspberry germplasm shows tremendous potential for use in breeding improved cultivars.
Author: Julie Graham Publisher: Springer ISBN: 9783319990309 Category : Science Languages : en Pages : 0
Book Description
Raspberry is a globally-significant soft fruit crop, with increasing interest to consumers due to its versatility and health-related constituents. In this background context, it is therefore timely to consider the present and future status of the raspberry crop, particularly with the advances in the use of molecular tools and plant phenotyping to improve our understanding of improving crop quality and fruit yields. Since the 1980s a wealth of fundamental genomics and metabolomics resources have been developed for soft fruits including linkage maps, physical maps, QTLs and expression tools. However, a number of serious and emerging challenges exist for the raspberry industry, including the plants’ ability to resist major pest and disease burdens and the impact of climate change on crop production, specifically water use and water availability for soft fruit crops. This book aims to address some of these challenges by updating the information known about this important crop, its health value, the major pest and diseases which affect raspberry and approaches for their control, and the speed and precision offered by selective breeding programs by the deployment of molecular tools and linkage maps for germplasm assessment. Understanding the genetic control of commercially and nutritionally important traits and the linkage of these characteristics to molecular markers on chromosomes is the future basis of plant breeding. We will also introduce the opportunity to fast track breeding by improving the speed of phenotypic selection by utilizing imaging sensor technologies, thereby reducing the cost of years of field assessment through developing this knowledge into markers linked to key fruit traits. The chapters of this book will span the knowledge gained from the collaborations between growers, plant breeders, plant physiologists, soil scientists, geneticists, agronomists and physicists which is essential to achieve progress in improving productivity and a sustainable industry.
Author: Kevin M. Folta Publisher: CRC Press ISBN: 1439856605 Category : Science Languages : en Pages : 229
Book Description
Recent interest in the health-related, culinary, and biological properties of berries is stimulating new initiatives in berry breeding and production. Breakthroughs in molecular technologies allow genomics-enabled approaches to augment research efforts. This volume documents the basic botany and culture of four major berry crops and follows the sci
Author: Matthew Robert Willman Publisher: ISBN: Category : Black raspberries Languages : en Pages : 166
Book Description
U.S. black raspberry (BR) production is currently limited by narrowly adapted, elite germplasm. Improved understanding of genetic control and stability of pomological traits will inform the development of improved BR germplasm and cultivars. To this end, analysis of a multiple-environment trial of two BR mapping populations derived from crosses of commercial cultivars with wild accessions has provided insights into genetic variation, genotype-by-environment interactions (GEI), quantitative trait loci (QTL), and QTL-by-environment interactions (QEI) of fruit quality traits among diverse field environments. Genetic components and stability of four fruit size traits and six fruit biochemistry were characterized in two mapping populations following their evaluation over three years at four distinct locations representative of current U.S. BR production. GEI of pomological traits were described using two methods: mixed model analysis and Bayesian Finlay-Wilkinson regression. Both methods revealed relatively stable genetic control of the four fruit size traits across the tested production environments and less stable genetic control of the six fruit biochemistry traits. Further, Finlay-Wilkinson regression revealed individuals contributing to GEI for each trait. Ten QTL associated with three fruit morphology traits and five QTL associated with two fruit biochemistry traits were identified. Of the fifteen total QTL, eleven exhibited significant QEI. Closely overlapping QTL revealed linkage of several fruit size traits: fruit mass, drupelet count, and seed fraction. Further, alignment of linked markers to the BR genome revealed genomic regions associated with these traits. These and related findings are expected to guide further genetic characterization of BR fruit quality, management of breeding germplasm, and development of improved BR cultivars for U.S. production.
Author: Jim F. Hancock Publisher: Springer Science & Business Media ISBN: 1402069073 Category : Science Languages : en Pages : 459
Book Description
This book fully integrates the conventional and biotechnological approaches to fruit crop breeding. Individual chapters are written on a wide variety of species covering all the major fruit crops in one volume. For each crop, there is a discussion of their taxonomy and evolution, history of improvement, crossing techniques, evaluation methods, and heritability of major traits and germplasm resources. Also discussed are the most recent advances in genetic mapping and QTL (quantitative trait loci) analysis, marker assisted breeding, gene cloning, gene expression analysis, regeneration and transformation. Patenting and licensing issues are also covered.
Author: Michael Dossett
Author: Michael Dossett
Author: Michael Dossett
Author: George Anderson Beach
Author: Julie Graham
Author: Kevin M. Folta
Author: Carlos Frost Williams
Author: Colorado Agricultural Experiment Station
Author: Matthew Robert Willman
Author: Jim F. Hancock
Author: