Genome design of hybrid potato

Zhang, Chengqi; Yang, Zhuo; Tang, Dié; Zhu, Yanhui; Wang, Pei; Li, Dawei; Zhu, Guangtao; Xiong, Xingyao; Shang, Yi; Li, Canhui; Huang, Sanwen

doi:10.1016/j.cell.2021.06.006

Cited by 121 publications

(111 citation statements)

References 55 publications

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“…It has been reported that JA increases tuber weight because tuber size increases when JA synthesis‐related genes are transformed into potato (Sohn et al, 2011). Thus, the introduction of naturally occurring or recreated beneficial alleles of core JA genes may support the rapid breeding of a more productive potato via hybrid seed potato breeding in the future (Zhang et al, 2021). To summarize, our results suggest that the modulation of tuber number by StJAZ1‐like was more significant than the modulation of tuber weight.…”

Section: Discussionmentioning

confidence: 99%

Modulation of JA signalling reveals the influence of StJAZ1‐like on tuber initiation and tuber bulking in potato

Song

Jing

et al. 2021

The Plant Journal

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Phytohormones and their interactions play critical roles in Solanum tuberosum (potato) tuberization. The stimulatory role of jasmonic acid (JA) in tuber development is well established because of its significant promotion of tuber initiation and tuber bulking. However, the dynamics and potential function of JA signalling in potato tuberization remain largely unknown. The present study investigated the role of the JAZ1 subtype, a suppressor of JA signalling, in potato tuberization. Using 35S:StJAZ1-like-GUS as a reporter, we showed that JA signalling was attenuated from the bud end to the stem end shortly after tuber initiation. Overexpression of StJAZ1-like suppressed tuber initiation by restricting the competence for tuber formation in stolon tips, as demonstrated by grafting an untransformed potato cultivar to the stock of StJAZ1-likeoverexpressing transgenic potato plants (StJAZ1-like ox). In addition, transcriptional profiling analysis revealed that StJAZ1-like modulates the expression of genes associated with transcriptional regulators, cell cycle, cytoskeleton and phytohormones. Furthermore, we showed that StJAZ1-like is destabilised upon treatment with abcisic acid (ABA), and the attenuated tuberization phenotype in StJAZ1-like ox plants can be partially rescued by ABA treatment. Altogether, these results revealed that StJAZ1-like-mediated JA signalling plays an essential role in potato tuberization.

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Section: Discussionmentioning

confidence: 99%

Modulation of JA signalling reveals the influence of StJAZ1‐like on tuber initiation and tuber bulking in potato

Song

Jing

et al. 2021

The Plant Journal

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“…Most of them are SI, but now it is possible to transform them to SC using the approaches discussed above. To date, the conventional breeding approach to breaking SI has gained success [ 64 ]. But other approaches like Sli transgenics and S-RNase edited lines can be used to break SI.…”

Section: Developing Hybrid Potatoesmentioning

confidence: 99%

“…Highly homozygous inbred lines can then be developed by continuous selfing, and genome-assisted selection can be used to remove deleterious mutations and stack a beneficial allele. Crossing these elite lines from different lineages may permit the exploitation of heterosis in their hybrids [ 64 ]. A schematic representation of the development of a diploid F 1 hybrid is shown in Figure 3 .…”

Section: Developing Hybrid Potatoesmentioning

confidence: 99%

“…After that there have been major achievements like development of recombinant inbred lines, development of self compatible clone, M6 and S-RNase edited lines [ 2 , 36 ], sequencing of SC clones, M6 and Solyntus [ 32 , 63 ], development of DNA markers [ 30 ] and cloning Sli [ 33 , 34 ]. These important events contributed to the development of diploid F 1 hybrid in potato [ 64 ].…”

Section: Figurementioning

confidence: 99%

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Molecular Approaches to Overcome Self-Incompatibility in Diploid Potatoes

Kardile

Yilma

Sathuvalli

2022

Plants

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There has been an increased interest in true potato seeds (TPS) as planting material because of their advantages over seed tubers. TPS produced from a tetraploid heterozygous bi-parental population produces non-uniform segregating progenies, which have had limited uniformity in yield and quality in commercial cultivation, and, thus, limited success. Inbreeding depression and self-incompatibility hamper the development of inbred lines in both tetraploid and diploid potatoes, impeding hybrid development efforts. Diploid potatoes have gametophytic self-incompatibility (SI) controlled by S-locus, harboring the male-dependent S-locus F-box (SLF/SFB) and female-dependent Stylar-RNase (S-RNase). Manipulation of these genes using biotechnological tools may lead to loss of self-incompatibility. Self-compatibility can also be achieved by the introgression of S-locus inhibitor (Sli) found in the self-compatible (SC) natural mutants of Solanum chacoense. The introgression of Sli through conventional breeding methods has gained much success. Recently, the Sli gene has been cloned from diverse SC diploid potato lines. It is expressed gametophytically and can overcome the SI in different diploid potato genotypes through conventional breeding or transgenic approaches. Interestingly, it has a 533 bp insertion in its promoter elements, a MITE transposon, making it a SC allele. Sli gene encodes an F-box protein PP2-B10, which consists of an F-box domain linked to a lectin domain. Interaction studies have revealed that the C-terminal region of Sli interacts with most of the StS-RNases, except StS-RNase 3, 9, 10, and 13, while full-length Sli cannot interact with StS-RNase 3, 9, 11, 13, and 14. Thus, Sli may play an essential role in mediating the interactions between pollen and stigma and function like SLFs to interact with and detoxify the S-RNases during pollen tube elongation to confer SC to SI lines. These advancements have opened new avenues in the diploid potato hybrid.

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“…Several subsequent studies not only corroborated that inbred populations in diploid potato were possible (Alsahlany et al 2021), but hybrids generated from these populations resulted in a crop that could compete in the same space as tetraploid potato (J. Stockem et al 2020;Zhang et al 2021). While diploid hybrid potato (DHP) populations are now extant across the world, there is at this time little known about the genetic components controlling complex traits as DHP is still a young hybrid crop.…”

Section: Introductionmentioning

confidence: 99%

Little heterosis found in Diploid Hybrid Potato

Adams

Zheng²,

Vries

et al. 2021

Preprint

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Hybrid potato breeding has become a novel alternative to con-ventional potato breeding allowing breeders to overcome intractable barriers (e.g. tetrasomic inheritance, masked deleterious alleles, obligate clonal propagation) with the benefit of seed-based propagule, flexible population design, and the potential of hybrid vigour. Until now, however, no formal inquiry has adequately examined the relevant genetic components for complex traits in hybrid potato populations. In this present study, we use a two-step modelling approach to estimate the relevant variance components to assess the magnitude of the general and specific combining abilities (GCA and SCA, respectively) in diploid hybrid potato (DHP). SCA effects were identified for all yield components studied here warranting evidence of non-additive genetic effects in hybrid potato yield. However, the estimated GCA effects were on average two times larger than their respective SCA quantile across all yield phenotypes. Tuber number GCA’s and SCA’s were found to be highly correlated with total yield’s genetic components. Tuber volume appearing under-selected in this population. The prominence of additive effects found for all traits presents evidence that breeders can perform hybrid potato evaluation using the mid-parent value alone. Heterotic vigour stands be useful in bolstering simpler traits but this will be very dependent on the target market of a population. This study represents the first diallel analysis of its kind in diploid potato using material derived from a commercial hybrid breeding programme.

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Genome design of hybrid potato

Cited by 121 publications

References 55 publications

Modulation of JA signalling reveals the influence of StJAZ1‐like on tuber initiation and tuber bulking in potato

Modulation of JA signalling reveals the influence of StJAZ1‐like on tuber initiation and tuber bulking in potato

Molecular Approaches to Overcome Self-Incompatibility in Diploid Potatoes

Little heterosis found in Diploid Hybrid Potato

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