Breeding guayule for commercial production

Ray, Dennis T.; Coffelt, T. A.; Dierig, David A.

doi:10.1016/j.indcrop.2004.06.005

Cited by 61 publications

(33 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…eff orts in the United States to domesticate and commercialize guayule as a renewable source of natural rubber (reviewed in Ray et al, 2005). Gray) is a potential source of natural rubber, but attempts to domesticate and cultivate this perennial crop for large-scale production in the southwestern United States have been intermittent over the past century.…”

Section: Complex Ploidy Level Variation In Guayule Breeding Programsmentioning

confidence: 99%

“…Because guayule diploids reproduce sexually, they have been more amenable than apomictic polyploids to plant breeding methodologies that require interbreeding of reselected plants, such as recurrent selection (Ray et al, 1995). Specialized breeding strategies have been designed to unite genetic variation from both diploids and polyploids into a single guayule cultivar (Ray et al, 2005;Thompson and Ray, 1988). Specialized breeding strategies have been designed to unite genetic variation from both diploids and polyploids into a single guayule cultivar (Ray et al, 2005;Thompson and Ray, 1988).…”

Section: Complex Ploidy Level Variation In Guayule Breeding Programsmentioning

confidence: 99%

“…The frequency and range of ploidy variation observed in this germplasm will help to direct future breeding efforts as well as linkage analysis and genome-wide association studies. eff orts in the United States to domesticate and commercialize guayule as a renewable source of natural rubber (reviewed in Ray et al, 2005). The prevalence of allergies attributed to latex from the rubber tree [Hevea brasiliensis (Willd.…”

Section: Complex Ploidy Level Variation In Guayule Breeding Programsmentioning

confidence: 99%

See 2 more Smart Citations

Complex Ploidy Level Variation in Guayule Breeding Programs

et al. 2011

Self Cite

View full text Add to dashboard Cite

Guayule (Parthenium argentatum A. Gray) is a potential source of natural rubber, but attempts to domesticate and cultivate this perennial crop for large‐scale production in the southwestern United States have been intermittent over the past century. Genetic improvement through modern plant breeding is needed to increase its yield potential and suitability for commercialization. Natural variation for ploidy level is extensive among individuals in wild guayule populations, but less is known about the extent of ploidy level variation in guayule breeding germplasm. Because ploidy variation is among the factors that slow the rate of genetic gain in guayule breeding programs, determining the ploidy level of publicly available guayule accessions would help to accelerate the development of stable, high yielding cultivars. To that end, we adapted flow cytometry to examine the ploidy of 34 guayule accessions available from the National Plant Germplasm System. The data revealed a natural polyploid series ranging from diploid (2n = 2x = 36) to pentaploid (2n = 5x = 90), with 4x being the predominant ploidy. Interestingly, not all plants sampled from an accession had the same ploidy level (mixed ploidy). Notably, the integration of ploidy and pedigree data uncovered complex ploidy variation in guayule breeding programs. The frequency and range of ploidy variation observed in this germplasm will help to direct future breeding efforts as well as linkage analysis and genome‐wide association studies.

show abstract

Section: Complex Ploidy Level Variation In Guayule Breeding Programsmentioning

confidence: 99%

Section: Complex Ploidy Level Variation In Guayule Breeding Programsmentioning

confidence: 99%

Section: Complex Ploidy Level Variation In Guayule Breeding Programsmentioning

confidence: 99%

See 1 more Smart Citation

Complex Ploidy Level Variation in Guayule Breeding Programs

et al. 2011

Self Cite

View full text Add to dashboard Cite

show abstract

“…In general, the process of domestication of a new crop candidate starts with genotype selection based on seed yield (Thompson 1990;Ray et al 2005). The increase in seed yield achieved in annual crops has been associated with the reallocation of photoassimilates (i.e.…”

Section: Introductionmentioning

confidence: 99%

Allocation patterns and phenology in wild and selected accessions of annual and perennial Physaria (Lesquerella, Brassicaceae)

González-Paleo

Ravetta

2011

Euphytica

View full text Add to dashboard Cite

Two processes that determine a good performance of plants in arid environments are phenology and resource allocation patterns. With a longer growing season and larger allocation to root, perennials achieve better access to resources and are more resilient to stresses than annuals. In traditional agricultural systems selection for optimal soil nutrient uptake has been a secondary breeding objective, because crops receive subsidies of water and fertilizers. However in arid lands, caution is required during domestication, to avoid changes in structural traits which may be the basis for sustainable production. Due to inherent differences in hierarchy among annual and perennial species, we propose that the changes in phenology and allocation brought about by selection will depend on the life cycle. We performed field studies comparing wild and selected accessions of annual and perennial species of Physaria. Life cycle determined the functional basis of seed yield. In annuals, selection resulted in early anthesis (1 week earlier), a lower allocation to roots and leaves (twofold lower), and an increase in harvest index (an increase of 62%). Selected perennials had higher biomass at maturity (45% higher), linked to a longer reproductive period (3 weeks longer) than their wild relatives. The vegetative allocation found in wild perennials remained unchanged after selection. While annuals selected for seed yield could compromise the capacity for acquisition of resources, selection in perennials did not modify the allocation strategy responsible for their positive adjustment to low resource environments. We found a trade off between seed yield potential and yield stability that resulted in lower performance of selected accessions in low quality environments in relation to their wild relatives.

show abstract

“…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.…”

mentioning

confidence: 99%

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

Ilut

Sanchez

Costich

et al. 2015

Industrial Crops and Products

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Breeding guayule for commercial production

Cited by 61 publications

References 20 publications

Complex Ploidy Level Variation in Guayule Breeding Programs

Complex Ploidy Level Variation in Guayule Breeding Programs

Allocation patterns and phenology in wild and selected accessions of annual and perennial Physaria (Lesquerella, Brassicaceae)

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

Contact Info

Product

Resources

About