Breeding Guayule

Thompson, A. E.; Ray, Dennis T.

doi:10.1002/9781118061039.ch4

Cited by 13 publications

(26 citation statements)

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“…It should be noted that accessions 11591 and N566 were both derived from the same historic accession (4265-I; Thompson and Ray, 1989), which in turn represented one of three predominant types identified by Johnson (1950) based on morphological and biochemical characteristics of historic accession 4265 (Fig. 1).…”

Section: Genomic Characterization Of Guayule Germplasmmentioning

confidence: 98%

“…Mariola, a perennial shrub native to Mexico and southwestern United States (Rollins, 1950), is a facultative apomict with a natural ploidy series and considered the closest related taxon to guayule (Powers and Rollins, 1945). It has been suggested as a source of vigor and disease resistance (Thompson and Ray, 1989), and its habitat range (Fig. B.5, see Supplementary data) suggests a broader climatic tolerance than guayule.…”

mentioning

confidence: 98%

“…B.5, see Supplementary data) suggests a broader climatic tolerance than guayule. Wild quinine is a perennial herbaceous plant native to central and eastern United States (Mears, 1975;Rollins, 1950) and a potential source of cold resistance and non-arid adaptation (Thompson and Ray, 1989). However, with the exception of a recent ploidy and nuclear genome size evaluation of mariola accessions (Sanchez et al, 2014), minimal genomic information is available for these two Parthenium species, and the availability of this information is expected to greatly facilitate interspecific breeding programs.…”

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confidence: 99%

“…Gray), a native plant of the desert regions of northern Mexico and southwestern United States, has been intermittently improved and cultivated as a source of natural rubber over the past century (reviewed in Hammond and Polhamus, 1965; Thompson and Ray, 1989). However, development of high rubber yielding cultivars has met with only partial success, in large part due to a combination of limited genetic diversity in the source of germplasm (Thompson and Ray, 1989), extensive polyploidy variation within and among the available guayule accessions (Gore et al, 2011), and a complex mode of reproduction that is characterized by sporophytic self-incompatibility in diploid plants and facultative apomixis (diplospory type) in polyploid plants (reviewed in Ray et al, 2005;Thompson and Ray, 1989). Recently, Gore et al (2011) successfully adapted automated flow cytometry methods to efficiently characterize ploidy level variation in guayule breeding programs.…”

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confidence: 99%

“…Although guayule is the only species in the genus Parthenium that produces significant quantities of natural rubber, interspecific hybrids with other Parthenium species are a potential source of such agronomic improvements (reviewed in Ray et al, 2010;Thompson and Ray, 1989), and several Parthenium species such as mariola (Parthenium incanum Kunth) and wild quinine (Parthenium integrifolium L.) have been shown to form natural and/or artificial interspecific hybrids with guayule (Powers and Rollins, 1945;Rollins, 1946;Hashemi et al, 1989). Mariola, a perennial shrub native to Mexico and southwestern United States (Rollins, 1950), is a facultative apomict with a natural ploidy series and considered the closest related taxon to guayule (Powers and Rollins, 1945).…”

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confidence: 99%

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Genomic diversity and phylogenetic relationships in the genus Parthenium (Asteraceae)

Ilut

Sanchez

Costich

et al. 2015

Industrial Crops and Products

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a b s t r a c tGuayule (Parthenium argentatum A. Gray) is a perennial woody shrub native to the North American Chihuahuan Desert that holds promise as a sustainable source of natural rubber and hypoallergenic latex. The improvement of guayule for commercial-scale production could be accelerated through genomicsassisted breeding, but such a strategy is severely limited by the paucity of available genomic tools and well-characterized genetic resources. To that end, we used genotyping-by-sequencing (GBS) to simultaneously identify and genotype tens of thousands of single-nucleotide polymorphism (SNP) markers across 62 plant samples from seven wild and cultivated guayule, three Parthenium interspecific hybrid, four mariola (Parthenium incanum Kunth), and one wild quinine (Parthenium integrifolium L.) accession(s) that have been characterized for ploidy level and nuclear genome size in this and a prior study. Phylogenetic analysis using the SNP data identified at least two distinct sources of guayule breeding material in the cultivated accessions, previously unknown multi-species hybrids within two Parthenium hybrid cultivars, and guayule/mariola hybrids within one guayule and one mariola wild collected accession. Similar to previously reported results for guayule and mariola, we observed aneuploidy and multiple ploidy levels among individual plants (mixed ploidy) within three Parthenium interspecific hybrid accessions newly characterized in this study. Nuclear genome size characterization of wild quinine, a first for this species, found an estimated haploid nuclear genome size (5757 Mb) for the tetraploid (2n = 4x = 72) accession that was more than 1.5-fold larger than that of tetraploid (2n = 4x = 72) guayule or mariola. Together, these results further underscore the need for a comprehensive characterization of available guayule germplasm and sister taxa with both SNP markers and flow cytometry, illustrate the novel utility of GBS for the genus Parthenium, and lay the foundation for genomics-assisted breeding in guayule.

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Section: Genomic Characterization Of Guayule Germplasmmentioning

confidence: 98%

mentioning

confidence: 98%

mentioning

confidence: 99%