Malus

Игнатов, А. Н.; Bodishevskaya, Anastasiya

doi:10.1007/978-3-642-16057-8_3

Cited by 14 publications

(4 citation statements)

References 100 publications

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“…However, single hybrid genotypes, obtained from the pollination of Malus sieboldii Rehd. by pollen of dwarf red-leaved rootstock forms, have a high regenerative potential [6] and resistance to diseases [2]. Similar results were obtained by other researchers [7][8][9][10][11][12].…”

Section: Introductionsupporting

confidence: 84%

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Development of methods for introducing hybrid progeny of Malus sieboldii Rehd. at in vitro conditions

et al. 2020

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The paper provides data on the use of the Malus sieboldii Rehd. as a genetic donor of economically valuable traits in breeding low-vigorous clonal apple rootstocks. The method of embryo culture is proposed as a way to increase the efficiency of distant crosses. The studies were carried out using seeds obtained in three combinations of crossing (M. sieboldii x Malysh Budagovskogo, M. sieboldii x 60-160, M. sieboldii x 76-3-6). As sterilizing agents when introduced into culture in vitro, we used industrial disinfectant «Belizna (Whiteness)», the sanitizer «Ecocid C» + «Belizna» and the sanitizer «BioPag C» + «Belizna». It was found that additional pretreatment with «Ecocid C» (1.0%) and "BioPag C" (0.4%) for 50 minutes before using the disinfectant «Belizna» contributes to the production of sterile explants up to 61.5% compared to the control. The best results were obtained when combine using «Ecocid C» (1.0%, 50 min.) and «Belizna» (50%, 5 min.). After 28 days, due to the low number of developing embryos, the method of dissection of a part of the cotyledons of hybrid seeds was used. As a result, up to 65.3% of hybrid plants were obtained, compared to 4.2% of the control.

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Section: Introductionsupporting

confidence: 84%

“…Plants of Malus sieboldii Rehd. were used as a promising genetic donor of economically valuable traits in breeding new apple rootstocks [1][2].…”

Section: Introductionmentioning

confidence: 99%

Development of methods for introducing hybrid progeny of Malus sieboldii Rehd. at in vitro conditions

et al. 2020

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“…robusta Carrière, Pyrus baccata var. cerasifera Regel) is referred to as a hybrid between the two primary wild apple species M. prunifolia and M. baccata (Jefferson, ; Ignatov & Bodishevskaya, ). One of the most famous accessions of this species is selection M .…”

Section: Discussionmentioning

confidence: 99%

Gene‐for‐gene relationship in the host–pathogen system Malus × robusta 5–Erwinia amylovora

et al. 2013

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SummaryFire blight is a destructive bacterial disease caused by Erwinia amylovora affecting plants in the family Rosaceae, including apple. Host resistance to fire blight is present mainly in accessions of Malus spp. and is thought to be quantitative in this pathosystem.In this study we analyzed the importance of the E. amylovora effector avrRpt2 EA , a homolog of Pseudomonas syringae avrRpt2, for resistance of Malus 9 robusta 5 (Mr5).The deletion mutant E. amylovora Ea1189DavrRpt2 EA was able to overcome the fire blight resistance of Mr5. One single nucleotide polymorphism (SNP), resulting in an exchange of cysteine to serine in the encoded protein, was detected in avrRpt2 EA of several Erwinia strains differing in virulence to Mr5. E. amylovora strains encoding serine (S-allele) were able to overcome resistance of Mr5, whereas strains encoding cysteine (C-allele) were not. Allele specificity was also observed in a coexpression assay with Arabidopsis thaliana RIN4 in Nicotiana benthamiana. A homolog of RIN4 has been detected and isolated in Mr5.These results suggest a system similar to the interaction of RPS2 from A. thaliana and AvrRpt2 from P. syringae with RIN4 as guard. Our data are suggestive of a gene-for-gene relationship for the host-pathogen system Mr5 and E. amylovora.

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“…Like in any breeding program, only a very small proportion of the initial seedlings make it through to the final stage of commercialization after several rounds of propagation and evaluation. For example, after 26 yr of evaluations, an apple breeding program in Germany released only three commercial cultivars from an initial set of 52 000 seedlings (Ignatov and Bodishevskaya, 2011). Thus, for many perennials, years of pruning, training, fertilizing, irrigating, and chemical intervention are required before it can be decided whether to keep or discard novel breeding material.…”

Section: The Perennial Problemmentioning

confidence: 99%

Genomics: A potential panacea for the perennial problem

McClure

Sawler

Gardner

et al. 2014

American J of Botany

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Perennial crops represent important fresh and processed food sources worldwide, but advancements in breeding perennials are often impeded due to their very nature. The perennial crops we rely on most for food take several years to reach production maturity and require large spaces to grow, which make breeding new cultivars costly compared with most annual crops. Because breeding perennials is inefficient and expensive, they are often grown in monocultures consisting of small numbers of elite cultivars that are vegetatively propagated for decades or even centuries. This practice puts many perennial crops at risk for calamity since they remain stationary in the face of evolving pest and disease pressures. Although there is tremendous genetic diversity available to them, perennial crop breeders often struggle to generate commercially successful cultivars in a timely and cost-effective manner because of the high costs of breeding. Moreover, consumers often expect the same cultivars to be available indefinitely, and there is often little or no incentive for growers and retailers to take the risk of adopting new cultivars. While genomics studies linking DNA variants to commercially important traits have been performed in diverse perennial crops, the translation of these studies into accelerated breeding of improved cultivars has been limited. Here we explain the "perennial problem" in detail and demonstrate how modern genomics tools can significantly improve the cost effectiveness of breeding perennial crops and thereby prevent crucial food sources from succumbing to the perils of perpetual propagation.

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Malus

Cited by 14 publications

References 100 publications

Development of methods for introducing hybrid progeny of Malus sieboldii Rehd. at in vitro conditions

Development of methods for introducing hybrid progeny of Malus sieboldii Rehd. at in vitro conditions

Gene‐for‐gene relationship in the host–pathogen system Malus × robusta 5–Erwinia amylovora

Genomics: A potential panacea for the perennial problem

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