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Sunday, July 19, 2020 | History

2 edition of Introgression of tetraploid Mexican wild species germplasm into cultivated potato gene pool found in the catalog.

Introgression of tetraploid Mexican wild species germplasm into cultivated potato gene pool

Kartika Dorothea Adiwilaga

Introgression of tetraploid Mexican wild species germplasm into cultivated potato gene pool

by Kartika Dorothea Adiwilaga

  • 208 Want to read
  • 39 Currently reading

Published .
Written in English

    Subjects:
  • Potatoes -- Genetics.,
  • Potatoes -- Varieties.

  • Edition Notes

    Statementby Kartika Dorothea Adiwilaga.
    The Physical Object
    Paginationix, 70 leaves, bound :
    Number of Pages70
    ID Numbers
    Open LibraryOL16850201M

    According to 59, p. 46), tetraploid members of the S. tuberosum Andigenum Group act like a “genetic sponge, absorbing genes via introgression from closely wild species, or other cultivated populations with which it hybridize[s].” This has allowed the Andigenum Group to expand to include countless variants through the processes of Cited by: Additional ploidy manipulations are commonly used in potato to access wild species germplasm. Solanum acaule is a 4x (2EBN) wild species, while Tuberosum Group is 4x (4EBN). In crosses to Tuberosum Group, the EBN of S. acaule can be increased by using plants that produce 2n by:

    Taxonomy and Genetic Differentiation among Wild and Cultivated Germplasm of Solanum sect. Petota Michael A. Hardigan, John Bamberg, C. Robin Buell, and David S. Douches* Abstract Because of their adaptation to a diverse set of habitats and stresses, wild species of cultivated crops offer new sources of genetic diversity for germplasm improvement. One is the gene pool (GP) concept proposed by Harlan and de Wet, where CWRs were classified into groups (GP‐1–GP‐3) based on the relative ease of gene exchange with cultivated crops. Gene exchange occurs relatively easily between primary (GP‐1) and secondary GPs (GP‐2) by crossing (and fertile hybrids can be produced), whereas gene Cited by:

      Qiang Xu and colleagues sequence four citrus species de novo, along with accessions, including primitive, wild and cultivated citrus. Their genomic analyses associate the CitRWP gene with Cited by: Cultivated potatoes (Solanum tuberosum L.), domesticated from wild Solanum species native to the Andes of southern Peru, possess a diverse gene pool representing more than tuber-bearing rela-tives (Solanum section Petota). A diversity panel of wild species, landraces, and cultivars was sequenced to assess genetic variation.


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Introgression of tetraploid Mexican wild species germplasm into cultivated potato gene pool by Kartika Dorothea Adiwilaga Download PDF EPUB FB2

Resistance to blackspot bruise has been identified in the wild species Solanum hjertingii and is therefore a potential germplasm resource for genetic resistance to this problem. A bridging cross between S. hjertingii and a cultivated diploid clone was used to produce a triploid hybrid population that exhibited very low tuber browning potential, indicating a Cited by: The wild potato species Solanum acaule (acl) was used as a model of a disomic tetraploid Solanum species to develop systematic methods of germplasm enhancement for disomic tetraploid species.

T he potato (Solanum spp.) germplasm resource is composed of wild relatives, four landrace (indigenous) cultivated species, and modern cultivars (Spooner et al.,).Although most cultivated potatoes are tetraploid, nearly three‐fourths of wild species relatives are diploid.

Wild potatoes are distributed from the southwestern United. Oryza minuta, a tetraploid wild relative of cultivated rice, is an important source of resistance genes to bacterial blight (BB). Advanced backcross progenies (monosomic alien additional lines, MAALs and introgression lines) have been derived from interspecific cross, O.

sativa x O. minuta using O. sativa as recurrent parent. Fifty-nine putative MAALs and introgression lines Cited by: 1. A breeding scheme involving ploidy and EBN manipulations was set up to overcome the interspecific barriers existing between the cultivated Solanum tuberosum and the wild species S.

commersonii. Three backcross generations were obtained that were analyzed by means of molecular markers in order to verify the occurrence of recombination between homeologous chromosomes, the extent of the wild Cited by:   Accessions and individual genotypes with high levels of resistance have been identified and will be used for studies on the inheritance of resistance and for introgression of resistance into the cultivated potato.

Crosses have been made between the diploid (2 EBN) wild species S. verrucosum and six diploid (1 EBN) wild species. The results clearly demonstrate the feasibility of germplasm introgression from sexually isolated diploid 1EBN species into the 4x (4EBN) gene pool of the cultivated potato.

Studies were conducted in Vridhachalam, Tamil Nadu, India, to evaluate the introgression of genes conferring disease resistance from wild species into cultivated groundnuts. The diploid (2n=20) wild species, Arachis cardenasii, was hybridized with A.

hypogaea cv. VRI 2 during summerand the resulting triploids (2n=30) were studied during summer Author: P. Varman. The triploid and pentaploid cultivated species are grown only on highland plateaus and slopes of the Andes, but diploid cultivated species are grown more widely and also used for breeding tetraploid varieties.

Wild and cultivated potato genetic resources provide a variety of reproductive and genetic features associated with species differentiation Cited by:   Taxonomic description of cultivated potato and its wild relatives: a complex task.

The family Solanaceae is comprised of 3,–4, species placed within about 90 genera. Potato (Solanum tuberosum L.), tomato (S. lycopersicum L.), aubergine or eggplant (S. melongena L.), chili pepper (Capsicum sp.), and husk tomato (Physalis sp.) are the well-known and most cultivated Cited by:   The genetic resources available for the improvement of the cultivated potato (Solanum tuberosum) are reviewed along with progress in their utilisation.

The conclusions are as follows. The wild and cultivated species of potato have been utilised in potato breeding to good effect, but only a very small sample of the available biodiversity has been by: pool of genetic resources that include wild species relatives of potato, landraces, cultivated potato itself, and distantly-related species.

Genomics tools will greatly increase the e ffi ciency. They were female fertile and were crossed with tetraploid cultivars, yielding an average of 19 seeds per fruit. Triplandroids provide the opportunity of transferring 2EBN tetraploid Mexican wild species in the series Longipedicellata germ plasm into the 4EBN cultivated by: Homoploid hybridization in the origin and evolution of wild diploid potato species Article (PDF Available) in Plant Systematics and Evolution (3) February with 57 Reads.

The method by which these stocks would be used for gene introgression is basically the same as for gene mapping. The wild (donor) species would be crossed to the marker stock and the Fl either selfed or backcrossed to a selected recurrent line--preferably the cultivar into which the trait is to be by: 1.

Introduction. The commercial potato, Solanum tuberosum subsp. tuberosum, has approximately wild and cultivated relatives which are probably more than that of any other food and feed species represent a range of ploidy levels from diploid to hexaploid.

The tuber bearing Solanum species have extraordinarily wide range of habitats from south Cited by: 5. Gene introgression from wild relatives to cultivated plants 1. III Seminar on Gene Introgression from wild relatives to cultivated crops Manjappa III Ph.

D Scholar Dept. of Genetics and Plant Breeding UAS GKVK Bangalore 1 2. Most wild potato species grow in the Andes, but 31 spe-cies and five hybrid species grow in Mexico (Table 1; Figure 1). Even though Mexico represented a well-collected region for potato germplasm, some species remained little-known or under-collected.

For example, S. hjertingii var. physa-loides, S. leptosepalum, and S. macropilosum were only. An effective method of incorporating germplasm of wild 2x Solanum species into the cultivated potato is through hybridization with haploids of 4x S.

tuberosum Group Tuberosum. 1. Introduction. Asparagus officinalis L. is a diploid (2n = 2x = 20), perennial, dioecious species and is the only Asparagus species cultivated worldwide as a vegetable crop. Nearly all current cultivars of this species are diploid and derived from the Dutch population “Violet Dutch” (s XVIII) (Kidner,Knaflewski, ).Because of their common origin, Cited by: 7.

The goal of germplasm enhancement is to introgress traits from wild crop relatives into cultivated material and eventually cultivars. It seeks to restore genetic diversity that has been lost over time or to augment cultivated material with novel alleles that improve parents in breeding programs.

This paper discusses potato germplasm enhancement efforts in the past, focusing Author: Paul C. Bethke, Dennis A. Halterman, Shelley H. Jansky.Late blight, caused by the oomycete pathogen Phytophthora infestans, is the most devastating disease for potatowe describe the positional cloning of the Rpi‐blb1 gene from the wild potato species Solanum bulbocastanum known for its high levels of resistance to late blight.

The Rpi‐blb1 locus, which confers full resistance to complex isolates of P. infestans and Cited by:   Markers were also developed for a secondary cultivated species G. barbadense cv. 3– A total of 62, non-redundant SNP markers were developed from the five wild species which can be utilized for interspecific germplasm introgression into cultivated G.

hirsutum and are directly associated with by: