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CRISPR gene editing of major domestication traits accelerating breeding for Solanaceae crops improvement

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Abstract

Key message

Domestication traits particularly fruit size and plant architecture and flowering are critical in transforming a progenitor’s wild stature into a super improved plant. The latest advancements in the CRISPR system, as well as its rapid adoption, are speeding up plant breeding.

Abstract

Solanaceae has a varied range of important crops, with a few model crops, such as tomato and, more recently, groundcherry, serving as a foundation for developing molecular techniques, genome editing tools, and establishing standards for other crops. Domestication traits in agricultural plants are quantified and widely adopted under modern plant breeding to improve small-fruited and bushy crop species like goji berry. The molecular mechanisms of the FW2.2, FW3.2, FW11.3, FAS/CLV3, LC/WUS, SP, SP5G, and CRISPR genome editing technology have been described in detail here. Furthermore, special focus has been placed on CRISPR gene editing achievements for revolutionizing Solanaceae breeding and changing the overall crop landscape. This review seeks to provide a thorough overview of the CRISPR technique’s ongoing advancements, particularly in Solanaceae, in terms of domesticated features, future prospects, and regulatory risks. We believe that this vigorous discussion will lead to a broader understanding of CRISPR gene editing as a tool for achieving key breeding goals in other Solanaceae minor crops with significant industrial value.

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Abbreviations

CRISPR:

Clustered regularly interspaced palindromic repeats

Cas9:

CRISPR associated nuclease 9

FW:

Fruit weight

LC:

Locule number

WUS:

Wuschel

FAS:

Fasciated

CLV:

Clavata

ZFN:

Zinc finger nuclease

TALEN:

Transcription activator like effector nucleases

IM:

Inflorescence meristem

FM:

Floral meristem

CNR:

Cell number regulator

PLAC8:

Placenta specific 8

CYP78A:

Cytochrome P450 class A78

CSR:

Cell size regulator

SNP:

Single nucleotide polymorphism

AG:

Agamous

NIL:

Near isogenic lines

WT:

Wild type

SP :

Self Pruning

SAM:

Shoot apical meristem

CEN:

Centroradialis

TFL1:

Terminal flowers

SFT:

Single flower truss

SP5G :

Self Pruning 5 Gene

SlER:

Solanum lycopersicum ERECTA

PAM:

Protospacer adjacent motif

Cpf1:

CRISPR Prevotella and Francisella 1

DSB:

Double strand break

Sp :

Streptococcus pyogenes

NHEJ:

Non-homologous end joining

HDR:

Homology directed repair

uORF:

Upstream open reading frame

dORF:

Downstream open reading frame

InDel:

Insertion/deletion

CSHL:

Cold spring harbor laboratory

Fast-TrACC:

Fast treated Agrobacterium co-culture

DR:

Developmental regulators

MULT:

Multiflora

CycB:

Lycopene beta cyclase

Ko:

Knock out

Ki:

Knock in

TCM:

Traditional Chinese medicine

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Acknowledgements

This work was supported by grants from Strategic and Priority Research Program of Chinese Academy of Sciences [XDA24030502], National Key R&D Program of China [2018YFD1000607]; the National Natural Science Foundation of China [31770334, 32170389]; Science and Technology Program of Guangzhou [201904010167]; Guangdong Provincial Special Fund For Modern Agriculture Industry Technology Innovation Teams, China [2020KJ148]. The funding organizations did not aid in designing the study and manuscript write up.

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FR, YW conceptualize the main theme; FR drafted the manuscript; FR, HG prepared scientific illustrations; YB, FR contributed in the concept of molecular mechanisms of genes; YW, SZ and HH reviewed the draft and suggested technical points to improve the manuscript. All authors read and approved for submission of revised version of the manuscript.

Corresponding authors

Correspondence to Fazal Rehman or Ying Wang.

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All authors declare no conflict of interest.

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Rehman, F., Gong, H., Bao, Y. et al. CRISPR gene editing of major domestication traits accelerating breeding for Solanaceae crops improvement. Plant Mol Biol 108, 157–173 (2022). https://doi.org/10.1007/s11103-021-01229-6

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  • DOI: https://doi.org/10.1007/s11103-021-01229-6

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