Backcross-breeding and doubled-haploid facilitated introgression of stripe rust resistance in bread wheat

Bakhtiar, F; Afshari, Farzad; Najafian, G; Mohammadi, Mohsen

doi:10.1080/03235408.2013.854612

Cited by 7 publications

(5 citation statements)

References 7 publications

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“…Backcross-DH strategy has been one of the successful examples. Thus, in Iran, yellow rust resistance was successfully and efficiently transferred to the adapted receptor cultivar "Ghods" by producing DH from tested BC2F2 plants [85]. The DH plants produced showed similar yield and phenology as the adapted parent but were resistant to two isolates of yellow rust and were produced in a shorter period of time.…”

Section: Doubled Haploid Breedingmentioning

confidence: 99%

Genetic Gains in Wheat Breeding and Its Role in Feeding the World

2019

Crop Breed Genet Genom.

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Wheat is the leading global food crop providing 19% of the daily calories and 21% of protein requirements for humans. The wheat production has increased from 220 million tons in 1961 to 750 million tons in 2018 with total production area of 220 million hectares which showed insignificant changes across years. The development of high yielding and widely adapted semi-dwarf input responsive wheat varieties, application of fertilizer, pesticides, irrigation, mechanization and implementation of favorable policies have contributed to such significant jump in wheat production at global level. The average annual genetic gain of wheat has been reported to be 1% while the demand for wheat increases by 1.7% annually reaching a total of 1 billion tons in 2050. To this end, conventional and molecular breeding strategies and approaches such as inter-country shuttle breeding, doubled haploid breeding, speed breeding, marker assisted selection, genomic selection, key location phenotyping and hybrid wheat breeding should be utilized intensively. The international wheat breeding programs at CIMMYT and ICARDA have developed and distributed germplasm to the world in the past 4 or more decades during which hundreds of high yielding and widely adapted wheat varieties with resistance tolerance to the major prevailing abiotic and biotic stresses have been released and adopted. Breeding progress or genetic gains in wheat has been determined by different authors with average relative gains reaching up to 2.5% per year. This paper reviews the global challenges facing demand and supply of wheat, the strategies to increase breeding efficiency and genetic gains, the impacts of the international wheat breeding and its progress, and future strategies to increase wheat production while conserving the natural resource base.

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Section: Doubled Haploid Breedingmentioning

confidence: 99%

Genetic Gains in Wheat Breeding and Its Role in Feeding the World

2019

Crop Breed Genet Genom.

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“…Haploids refer to plants carrying one pair of chromosome (n) which is then doubled to produce homozygous DH (2n) plants. Use of haploids enhances genetic gains where homozygous lines can be attained within 2-3 generations compared to conventional methods which can take up to 8 generations (Figure 21) (Rahman and de Jiménez, 2016;Begheyn et al, 2016;Bakhtiar et al, 2014;Gordillo and Geiger, 2010).…”

Section: Doubled Haploid Breedingmentioning

confidence: 99%

“…DH lines can be maintained by selfing or through sib-mating so as to maintain vigor of the lines (Dicu and Cristea, 2016;Jumbo et al, 2011). DH technique is increasingly being used in improvement of maize, with emphasis on generation of lines homozygous for superior agronomic traits (Bakhtiar et al, 2014;Wessels and Botes, 2014;Battistelli et al, 2013;Prigge, 2012).…”

Section: Doubled Haploid Breedingmentioning

confidence: 99%

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Awata¹,

Tongoona²,

Danquah³

et al. 2019

Int. J. Adv. Agric. Res.

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Maize is the second most important cereal crop in the world after wheat followed by rice. Although, it is among the latest entries in the list of food crops in Africa, maize has attracted much more attention in terms of research and adaptability. Consequently, maize has become the number 1 crop with significant contribution to modern farming and food security in sub-Saharan Africa (SSA). Majority of the population in the region depend on maize as their main source of calories, income and livelihood. Additionally, maize is of global importance as a model organism for advancement of genetic studies. However, maize production in the region is conditioned by complex factors leading to very low average yield compared to other parts of the world. General understanding of tropical maize is one of the key approaches required for improvement of tropical maize in SSA.Here an attempt was made to review various aspects of maize and major advances including the origin, taxonomy, genetics, morphology, physiology, cultural practices, yield potentials, breeding, and production constraints. The information generated could provide useful insights into tropical maize and might contribute towards enhancement of the crop for food security in SSA.

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“…tritici) (Mago et al, 2011;Wessels and Botes, 2014), and stripe rust (Puccinia striiformis f. sp. tritici) (Bakhtiar et al, 2014) in wheat; resistance to stripe rust (Puccinia striiformis f. sp. hordei.)…”

Section: Doubled Haploids and Marker Assisted Selectionmentioning

confidence: 99%

Haploids: Constraints and opportunities in plant breeding

Dwivedi

Britt

Tripathi

et al. 2015

Biotechnology Advances

226

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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Backcross-breeding and doubled-haploid facilitated introgression of stripe rust resistance in bread wheat

Cited by 7 publications

References 7 publications

Genetic Gains in Wheat Breeding and Its Role in Feeding the World

Genetic Gains in Wheat Breeding and Its Role in Feeding the World

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Haploids: Constraints and opportunities in plant breeding

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