Hordeum vulgare × H. bulbosumtetraploid hybrid provides useful agronomic introgression lines for breeders

Zhang, Liangtao; Pickering, R. A.; Murray, B. G.

doi:10.1080/01140671.2001.9514185

Cited by 20 publications

(19 citation statements)

References 14 publications

(8 reference statements)

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“…We have also identified plants containing one or more introgressions of DNA from H. bulbosum into H. vulgare on 13 of the possible 14 chromosome arms. These RLs were derived from backcrosses of triploid "VBBs" to barley or from selfed progenies of tetraploid "VVBB" hybrids (Zhang et al, 2001). Loci transferred from H. bulbosum by ourselves and other research groups (Walther et al, 2000;Ruge et al, 2003) confer disease resistance and other traits, and have been located on particular chromosomes (Table 3).…”

Section: Development Of Chromosome Substitutions and Recombinantsmentioning

confidence: 99%

“…In general, the introgression sites are distally located and usually appear physically small although there are variations in size (Zhang et al, 2001). The relative frequency of introgressions on particular chromosome arms also differs (Table 3) and may indicate that association among H. vulgare and H. bulbosum homoeologues varies; there is, for example, evidence that 2H and 4H homoeologous chromosomes associate more frequently than others (Xu and Snape, 1988).…”

Section: Size and Locations Of The Introgressionsmentioning

confidence: 99%

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Recent progress in barley improvement using wild species of Hordeum

Pickering

Johnston²

2005

Cytogenet Genome Res

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In this review we describe recent progress in barley (Hordeum vulgare) improvement through hybridisation with its wild relatives. We have focused on one species in the secondary genepool of cultivated barley, namely H. bulbosum. This wild species has desirable traits, such as disease resistance, that are worthwhile transferring to its cultivated relative. Progress has been achieved through developing partially fertile interspecific hybrids that have been selfed or backcrossed to barley. We present the results of cytogenetic and molecular analyses that have enabled us to characterise and produce agronomically useful recombinant lines obtained from the hybrids.

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Section: Development Of Chromosome Substitutions and Recombinantsmentioning

confidence: 99%

Section: Size and Locations Of The Introgressionsmentioning

confidence: 99%

Recent progress in barley improvement using wild species of Hordeum

Pickering

Johnston²

2005

Cytogenet Genome Res

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“…Powdery mildew resistance (Pickering and Johnston, 2005), mosaic virus resistance (Ruge-Wehling et al, 2006), septoria resistance (Toubia-Rahme et al, 2003), and leaf rust resistance (Zhang et al, 2001) security could benefit significantly from the long-term conservation and exploitation of these taxa. Following the prioritization of such taxa based on their potential use value, planning for conservation will be facilitated through an analysis of the range of distribution of these taxa and the subsequent identification of hotspots of richness of CWRs in the United States as well as geographic and taxonomic gaps in germplasm collections and in situ conservation.…”

Section: Helianthus Neglectus Heisermentioning

confidence: 99%

An Inventory of Crop Wild Relatives of the United States

et al. 2013

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The use of crop wild relatives (CWRs) in breeding is likely to continue to intensify as utilization techniques improve and crop adaptation to climate change becomes more pressing. Significant gaps remain in the conservation of these genetic resources. As a first step toward a national strategy for the conservation of CWRs, we present an inventory of taxa occurring in the United States, with suggested prioritization of species based on potential value in crop improvement. We listed 4600 taxa from 985 genera and 194 plant families, including CWRs of potential value via breeding as well as wild species of direct use for food, forage, medicine, herb, ornamental, and/or environmental restoration purposes. United States CWRs are related to a broad range of important food, forage and feed, medicinal, ornamental, and industrial crops. Some potentially valuable species are threatened in the wild, including relatives of sunflower (Helianthus annuus L.), walnut (Juglans regia L.), pepo squash (Cucurbita pepo L.), wild rice (Zizania L.), raspberry (Rubus idaeus L.), and plum (Prunus salicina Lindl.), and few accessions of such taxa are currently conserved ex situ. We prioritize 821 taxa from 69 genera primarily related to major food crops, particularly the approximately 285 native taxa from 30 genera that are most closely related to such crops. Both the urgent collection for ex situ conservation and the management of such taxa in protected areas are warranted, necessitating partnerships between concerned organizations, aligned with regional and global initiatives to conserve and provide access to CWR diversity.

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“…Once genetic transfer has been demonstrated, then cytological analyses are conducted to confirm introgression and, in some instances, to further determine the amount and chromosome location of the alien chromatin on the hybrid derivatives (e.g., Friebe et al, 1996;Zhang et al, 2001;Wei et al, 2003;Kosmala et al, 2006). However, preliminary cytogenetic analyses can provide useful information on the potential for gene exchange at a wide genome level (Parokonny et al, 1997;Benavente et al, 2001) and may serve to identify the chromosomes for which interspecific transfer has the greatest probability of occurring.…”

Section: Karyotype Evolution In Hybrid Progeniesmentioning

confidence: 99%

The use of cytogenetic tools for studies in the crop-to-wild gene transfer scenario

Benavente

Cifuentes

Dusautoir³

et al. 2008

Cytogenet Genome Res

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Interspecific hybridization in plants is an important evolutionary phenomenon involved in the dynamics of speciation that receives increasing interest in the context of possible gene escapes from transgenic crop varieties. Crops are able to cross-pollinate with a number of wild related species and exchange chromosome segments through homoeologous recombination. In this paper, we review a set of cytogenetic techniques that are appropriate to document the different steps required for the stable introgression of a chromosome segment from a donor species (i.e., the crop) into a recipient species (i.e., the wild). Several examples in hybrids and derivatives are given to illustrate how these approaches may be used to evaluate the potential for gene transfer between crops and wild relatives. Different techniques, from classical chromosome staining methods to recent developments in molecular cytogenetics, can be used to differentiate genomes and identify the chromosome regions eventually involved in genetic exchanges. Some clues are also given for the study of fertility restoration in the interspecific hybrid forms.

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Hordeum vulgare × H. bulbosumtetraploid hybrid provides useful agronomic introgression lines for breeders

Cited by 20 publications

References 14 publications

Recent progress in barley improvement using wild species of <i>Hordeum</i>

Recent progress in barley improvement using wild species of <i>Hordeum</i>

An Inventory of Crop Wild Relatives of the United States

The use of cytogenetic tools for studies in the crop-to-wild gene transfer scenario

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