Molecular cytogenetic characterization of stem rust and stripe rust resistance in wheat-Thinopyrum bessarabicum–derived doubled haploid lines

Singh, Amit Kumar; Zhang, Peng; Dong, Chongmei; Li, Jianbo; Trethowan, Richard; Sharp, P. J.

doi:10.1007/s11032-019-1034-z

Cited by 14 publications

(2 citation statements)

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“…Over the years, the Wheat × Maize System has been gradually upgraded and now offers a powerful tool for research on wheat genetics and breeding. This includes applications such as molecular cytogenetic characterization [68], the development of thermophoto sensitive genic male sterile lines [36], QTL mapping [69], and so on.…”

Section: Research Progress Of the Wheat × Maize Systemmentioning

confidence: 99%

Technology for Production of Wheat Doubled Haploid via Maize Pollen Induction—Updated Review

Guan,

Peng,

2024

Agronomy

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Chromosome elimination resulting in haploids is achieved by rapid loss of chromosomes from one parent during the zygote stage and is an important procedure to produce doubled haploid (DH) lines in plants. During crosses between an emasculated wheat (Triticum aestivum L.) and maize (Zea mays L.) as pollen donors, the complete loss of maize chromosomes results in wheat haploid embryos. Through embryo rescue and chromosome doubling processes, pure lines with stable traits can be quickly obtained. The technique is called the “Wheat × Maize System”. Although this technology is not new, it remains a practical approach to date. In order to optimize and improve this technology and to achieve its maximum potential in the winter wheat area of China, this paper reviews the previous and ongoing research and technical procedures for the production of wheat DH lines via the maize pollen induction and presents outlooks on DH research and its application in wheat breeding.

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Section: Research Progress Of the Wheat × Maize Systemmentioning

confidence: 99%

Technology for Production of Wheat Doubled Haploid via Maize Pollen Induction—Updated Review

Guan,

Peng,

2024

Agronomy

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“…;Sharma 1995;Singh et al 2019;Niranjana et al 2022). Among the wild relatives, species belonging to Aegilops genus have been widely used as a good source of rust resistance genes(Riley et al 1968;Dvorak 1977; Prazak 1997; Tomar and Menon 2001; Aghaee-Sarbarzeh et al 2002; Ozgen et al 2004; Singh et al 2004; Bossolini et al 2006; Chhuneja et al 2008; Marais et al 2008, 2010a, c).…”

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confidence: 99%

Breaking the association between gametocidal gene(s) and leaf rust resistance gene (LrS2427) in Triticum aestivum-Aegilops speltoides derivative by gamma irradiation

Murukan,

Sekhon

et al. 2024

Preprint

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Utilization of crop wild relatives of wheat can be very effective in building the genetic diversity to cater to the evolving strains of disease pathogens. Aegilops speltoides is a rich source of rust resistance genes however transferring those to wheat genome can be tedious due to co-transfer and preferential transmission of undesirable genes causing gametocidal activity. Such an unholy association was observed in Triticum aestivum-Ae. speltoides derivative line Sel. 2427 which possess the broad-spectrum leaf rust seedling resistance gene (LrS2427). In situ hybridization studies revealed the presence of S genome in Sel. 2427, showing translocations to six telomeric regions involving four chromosomes. This confirms the presence of genes associated with gametocidal activity along with the beneficial LrS2427. QTLs associated with the component traits of gametocidal activity have been localized to 2A, 2D, 3D chromosomes however candidate genes for fertility were identified only in 2A and 2D chromosomes. This is in accordance with the reports of gametocidal genes mapped to 2S chromosomes in Ae. speltoides. To break the inadvertent association, F1(Agra Local X Sel. 2427) seeds were irradiated with gamma rays and leaf rust resistant mutants lacking gametocidal activity were developed. These mutants showed resistance to different races of leaf rust pathogen and showed superior agronomic performance as well. These mutants could be a great resource in wheat improvement for utilization of the leaf rust resistance gene LrS2427 without any yield penalty.

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Species with Haploid or Doubled Haploid Protocols

Seguí-Simarro

Moreno

Fernández

et al. 2021

Methods in Molecular Biology

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Molecular cytogenetic characterization of stem rust and stripe rust resistance in wheat-Thinopyrum bessarabicum–derived doubled haploid lines

Cited by 14 publications

References 50 publications

Technology for Production of Wheat Doubled Haploid via Maize Pollen Induction—Updated Review

Technology for Production of Wheat Doubled Haploid via Maize Pollen Induction—Updated Review

Breaking the association between gametocidal gene(s) and leaf rust resistance gene (LrS2427) in Triticum aestivum-Aegilops speltoides derivative by gamma irradiation

Species with Haploid or Doubled Haploid Protocols

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