Estimated economic benefit of double-haploid technique for peruvian barley growers and breeders

Gómez-Pando, Luz Rayda; Jimenez-Davalos, Jorge; Barra, Ana Eguiluz de la; Aguilar-Castellanos, Enrique; Falconí-Palomino, J.; Ibañez-Tremolada, Martha; Aspiolea, M. E.; Lorenzo, José Carlos

doi:10.1556/crc.37.2009.2.17

Cited by 8 publications

(4 citation statements)

References 5 publications

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“…Similarly, ‘AC Andrew’ is an anther culture–derived DH line that accounted for 99% of the Canada Western Soft White Spring acreage. Recent assessments of the value of DH barley varieties have been provided by Gomez‐Pando et al. (2009a,b).…”

Section: Exploitationmentioning

confidence: 99%

Haploids in flowering plants: origins and exploitation

Dunwell

2010

Plant Biotechnology Journal

365

277

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SummaryThe first haploid angiosperm, a dwarf form of cotton with half the normal chromosome complement, was discovered in 1920, and in the ninety years since then such plants have been identified in many other species. They can occur either spontaneously or can be induced by modified pollination methods in vivo, or by in vitro culture of immature male or female gametophytes. Haploids represent an immediate, one-stage route to homozygous diploids and thence to F 1 hybrid production. The commercial exploitation of heterosis in such F 1 hybrids leads to the development of hybrid seed companies and subsequently to the GM revolution in agriculture. This review describes the range of techniques available for the isolation or induction of haploids and discusses their value in a range of areas, from fundamental research on mutant isolation and transformation, through to applied aspects of quantitative genetics and plant breeding. It will also focus on how molecular methods have been used recently to explore some of the underlying aspects of this fascinating developmental phenomenon.

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Section: Exploitationmentioning

confidence: 99%

Haploids in flowering plants: origins and exploitation

Dunwell

2010

Plant Biotechnology Journal

365

277

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“…haploid (DH) technology as a means of conserving landrace diversity in a homozygous form that would simplify germplasm conservation and be more readily usable by plant breeders (Sood et al 2014;Gorjanc et al 2016;Melchinger et al 2017;Mayer et al 2017). The directed induction of DH lines has been developed for several crops to accelerate breeding (Smith et al 2008;Gomez-Pando et al 2009;Dunwell 2010). The technology permits the instantaneous development of homozygous lines within a single generation instead of six to ten generations of conventional recurrent self-pollination .…”

Section: Introductionmentioning

confidence: 99%

Selective loss of diversity in doubled-haploid lines from European maize landraces

Zeitler

Ross‐Ibarra

Stetter

2019

Preprint

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Maize landraces are well adapted to their local environments and present valuable sources of genetic diversity for breeding and conservation. But the maintenance of open-pollinated landraces in ex-situ programs is challenging, as regeneration of seed can often lead to inbreeding depression and the loss of diversity due to genetic drift. Recent reports suggest that the production of doubled-haploid (DH) lines from landraces may serve as a convenient means to preserve genetic diversity in a homozygous form that is immediately useful for modern breeding. The production of doubled-haploid (DH) lines presents an extreme case of inbreeding which results in instantaneous homozygosity genome-wide. Here we analyzed the effect of DH production on genetic diversity, using genome-wide SNP data from hundreds of individuals of five European landraces and their related DH lines. In contrast to previous findings, we observe a dramatic loss of diversity at both the haplotype level and that of individual SNPs. We identify thousands of SNPs that exhibit allele frequency differences larger than expected under models of neutral genetic drift, and document patterns of heterozygosity and polymorphism at conserved sites that suggest an important role for deleterious recessive load in determining diversity differences between landrace and DH populations.Although we were unable to uncover more details about the mode of selection, we conclude that while landrace DH lines may be a valuable tool for the introduction of variation into maize breeding programs they come at the cost of decreased genetic diversity and increased genetic load.

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“…For example, 25 wheat cultivars accounted for more than one third of the Canadian wheat acreage, with Lillian and AC Andrew being the most widely grown wheat cultivars in Canada (DePauw et al, 2011), or a DH-derived wheat cultivar Glossa grew in 16% of the total wheat area (300,000 ha) just in 5 years after its release in Romania (Sãulescu et al, 2012). The Peruvian highland barley farmers benefitted the most by growing DH-derived barley lines (Ya/LM94-PC27, B12/LM94-PC34), while the researchers in Peru saved 26% research cost by adopting DH technology in barley breeding program (Gomez-Pando et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Haploids: Constraints and opportunities in plant breeding

Dwivedi

Britt

Tripathi

et al. 2015

Biotechnology Advances

236

134

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The discovery of haploids in higher plants led to the use of doubled haploid (DH) technology in plant breeding. This article provides the state of the art on DH technology including the induction and identification of haploids, what factors influence haploid induction, molecular basis of microspore embryogenesis, the genetics underpinnings of haploid induction and its use in plant breeding, particularly to fix traits and unlock genetic variation. Both in vitro and in vivo methods have been used to induce haploids that are thereafter chromosome doubled to produce DH. Various heritable factors contribute to the successful induction of haploids, whose genetics is that of a quantitative trait. Genomic regions associated with in vitro and in vivo DH production were noted in various crops with the aid of DNA markers. It seems that F2 plants are the most suitable for the induction of DH lines than F1 plants. Identifying putative haploids is a key issue in haploid breeding. DH technology in Brassicas and cereals, such as barley, maize, rice, rye and wheat, has been improved and used routinely in cultivar development, while in other food staples such as pulses and root crops the technology has not reached to the stage leading to its application in plant breeding. The centromere-mediated haploid induction system has been used in Arabidopsis, but not yet in crops. Most food staples are derived from genomic resources-rich crops, including those with sequenced reference genomes. The integration of genomic resources with DH technology provides new opportunities for the improving selection methods, maximizing selection gains and accelerate cultivar development. Marker-aided breeding and DH technology have been used to improve host plant resistance in barley, rice, and wheat. Multinational seed companies are using DH technology in large-scale production of inbred lines for further development of hybrid cultivars, particularly in maize. The public sector provides support to national programs or small-medium private seed for the exploitation of DH technology in plant breeding.

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Estimated economic benefit of double-haploid technique for peruvian barley growers and breeders

Cited by 8 publications

References 5 publications

Haploids in flowering plants: origins and exploitation

Haploids in flowering plants: origins and exploitation

Selective loss of diversity in doubled-haploid lines from European maize landraces

Haploids: Constraints and opportunities in plant breeding

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