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Estimating genetic variability in horticultural crop species at different stages of domestication

Persson, Helena (2001). Estimating genetic variability in horticultural crop species at different stages of domestication. Diss. (sammanfattning/summary) Alnarp : Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae. Agraria, 1401-6249 ; 289
ISBN 91-576-5838-2
[Doctoral thesis]

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Abstract

Domestication may be viewed as an evolutionary process, involving mechanisms like muta- tion, selection, genetic drift, hybridization and polyploidization, and in the end resulting in individuals with traits profitable for man. The advent of modern plant breeding has acceler- ated the domestication of plants considerably. Plant breeding is essentially a selection of plant material based on the existence of genetic variation. Genetic variation within species has been assessed by many methods and from several perspectives. In the present thesis, I study some genetical aspects in five crop species at different stages of domestication, using RAPD and morphological characters. The very first step in the domestication process in- volves selection of plant material in nature. Often, only a small amount of the variation present in the source material is represented in the samples taken. Domesticated populations of Turk‘s-cap lily proved, however, to contain as high levels of genetic variation as native populations. A totally different pattern was found in black chokeberry, as no variation at all could be found in cultivated material. In such a case, it is of vital importance to broaden the genetic basis within the crop, and this may be accomplished by incorporation of new selec- tions from nature. In order to optimize collection strategies, information must be aquired about genetic structure in these populations. Native plant material of black chokeberry turned out to contain substantial amounts of variation, however tetraploid and presumably apomic- tic plants produced progeny groups with much less variability than progeny groups derived from diploid plants. In native populations of lingonberry, individual clones extended at least 30m, which gives an indication of how to collect plants for maximizing the genetic variation within the material. In crops where valuable cultivars already have been developed, tools for simple and fast identification of these cultivars are needed. In the present thesis, both RAPD markers and morphology were successfully used to identify twelve cultivars of rhubarb. Moreover, to facilitate the breeding work, molecular markers linked to traits of interest are highly desirable. In this thesis, RAPD was used to search for a marker linked to sex determi- nation in sea bucktho

Authors/Creators:Persson, Helena
Title:Estimating genetic variability in horticultural crop species at different stages of domestication
Year of publishing :January 2001
Volume:289
Number of Pages:37
Papers/manuscripts:
NumberReferences
ALLI. Persson HA, Lundquist K and Nybom H (1998) RAPD analysis of genetic variation within and among populations of Turk’s-cap lily (Lilium martagoiz L.). Hereditas 128: 213-220. 11. Persson HA and Nybom H (1998) Genetic sex determination and RAPD marker segregation in the dioecious species sea buckthorn (Hippophae rhamizoides L.). Hereditas 129: 45-51. 111. Persson HA, Rumpunen K and Mollerstedt LK (2000) Identification of culi- nary rhubarb (Rheum spp.) cultivars using morphological characterization and RAPD markers. Journal of Horticultural Science & Biotechnology 75: 684- 689. Iv. Persson HA and Gustavsson BA (2001) The extent of clonality and genetic diversity in lingonberry (Vaccinium vitis-idaea L.) revealed by RAPDs and leaf-shape analysis. Molecular Ecology 10: 1385-1397. v. Persson HA, Jeppsson N, Bartish IV and Nybom H. RAPD-based estimates of genetic variation reveal different reproductive strategies in black chokeberry [Aronia melanocarpa (Michx.) Ell.]. (Manuscri
Place of Publication:Alnarp
ISBN for printed version:91-576-5838-2
ISSN:1401-6249
Language:English
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:F Plant production > F30 Plant genetics and breeding
Subjects:Not in use, please see Agris categories
Agrovoc terms:aronia melanocarpa, domestication, genetic resources, genetic variation, hippophae, lilium, rheum, vaccinium vitis idaea, aronia melanocarpa
Keywords:Aronia melanocarpa, Hippophae rhamnoides, Lilium martagon, Rheum, Vaccinium vitis-idaea, molecular markers, genetic diversity
ID Code:28
Department:(NL, NJ) > Institutionen för växtvetenskap
Deposited By: Staff Epsilon
Deposited On:02 May 2002 00:00
Metadata Last Modified:02 Dec 2014 10:01

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