Artificial selection in the expansion of rice cultivation

Fujino, Kenji; Kawahara, Yoshihiro; Shirasawa, Kenta

doi:10.1007/s00122-021-03966-0

Cited by 13 publications

(5 citation statements)

References 56 publications

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“…2012 ), which led to dramatically earlier flowering with acceptable yields, was a key event that supported rice cultivation in subarctic areas of Japan ( Fig. 1 ) ( Fujino et al. 2022 ).…”

Section: What Are High-priority Challenges For Rice Domestication Res...mentioning

confidence: 99%

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Reloading DNA History in Rice Domestication

Izawa

2022

Plant and Cell Physiology

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Although crop domestication is a prehistoric event, DNA (or genome) sequences of modern cultivars and the accession lines of wild relatives contain information regarding the history of crop domestication and the breeding process. Accordingly, with plentiful genomic data, many new findings have been obtained concerning the crop domestication process, for which various (some controversial) interpretations exist. Since approximately 20 years ago, dozens of quantitative trait genes (QTGs) related to the domestication process have been cloned from several crops including rice, a global staple food. However, the determination of how and when these QTGs were involved in rice domestication requires a precise understanding of the DNA code. In addition to the identification of domestication-related QTGs, large-scale rice genome analysis based on short-read Illumina data (but with shallow depth) including more than 1000 rice cultivars and hundreds of wild rice (or Oryza rufipogon) lines, along with extensive genome analysis including more than 3000 cultivars with sufficient Illumina data, has been reported. From those data, the genome-wide changes during rice domestication have been explained. However, these genome-wide changes were not interpreted based on QTG changes for domestication-related traits during rice domestication. In addition, a substantial gap remains between the archeological hypothesis based on ancient relics and findings from DNA variations among current cultivars. Thus, this review reconsiders the present status of rice domestication research from a biologist’s perspective.

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“…2012 ), which led to dramatically earlier flowering with acceptable yields, was a key event that supported rice cultivation in subarctic areas of Japan ( Fig. 1 ) ( Fujino et al. 2022 ).…”

Section: What Are High-priority Challenges For Rice Domestication Res...mentioning

confidence: 99%

“…This northward progression required substantial biological reduction of photoperiodic floral induction and floral repression in cold environments ( Izawa 2007 , Cui et al. 2020 , Fujino et al. 2022 ).…”

Section: Perspective Shift From Genome-wide Means To Qtn Selection Hi...mentioning

confidence: 99%

Reloading DNA History in Rice Domestication

Izawa

2022

Plant and Cell Physiology

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“…In fact, modification of flowering time is one of the most common domestication syndromes. The ancestral progenitors of many economically important SD crops including sorghum, maize, potato, and japonica rice are thought to have originated in lower latitudes and through domestication acquired the ability to flower (or tuberization in potato) in LD, facilitating their cultivation in new environments at higher latitudes (Fujino et al., 2022; Hardigan et al., 2017; Huang et al., 2018; Hung et al., 2012; Klein et al., 2015; Koo et al., 2013).…”

Section: Introductionmentioning

confidence: 99%

Loss of daylength sensitivity by splice site mutation in Cannabis pseudo‐response regulator

Leckie,

Sawler,

Kapos

et al. 2024

The Plant Journal

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SUMMARYPhotoperiod insensitivity (auto‐flowering) in drug‐type Cannabis sativa circumvents the need for short day (SD) flowering requirements making outdoor cultivation in high latitudes possible. However, the benefits of photoperiod insensitivity are counterbalanced by low cannabinoid content and poor flower quality in auto‐flowering genotypes. Despite recent studies in cannabis flowering, a mechanistic understanding of photoperiod insensitivity is still lacking. We used a combination of genome‐wide association study and genetic fine‐mapping to identify the genetic cause of auto‐flowering in cannabis. We then used gene expression analyses and transient transformation assays to characterize flowering time control. Herein, we identify a splice site mutation within circadian clock gene PSEUDO‐RESPONSE REGULATOR 37 (CsPRR37) in auto‐flowering cannabis. We show that CsPRR37 represses FT expression and its circadian oscillations transition to a less repressive state during SD as compared to long days (LD). We identify several key circadian clock genes whose expression is altered in auto‐flowering cannabis, particularly under non‐inductive LD. Research into the pervasiveness of this mutation and others affecting flowering time will help elucidate cannabis domestication history and advance cannabis breeding toward a more sustainable outdoor cultivation system.

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“…In fact, modification of flowering time is one of the most common domestication syndromes. The ancestral progenitors of many economically important crops including Sorghum, maize, potato, and Japonica rice are thought to have originated in lower latitudes, and through domestication acquired the ability to flower (or tuberization in potato) in LD facilitating their cultivation in new environments at higher latitudes (Fujino et al, 2022; Huang et al, 2018; Hardigan et al, 2017; Klein et al, 2015; Koo et al, 2013; Hung et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Loss of daylength sensitivity by splice site mutation in Cannabis

Leckie¹,

Sawler²,

Kapos³

et al. 2023

Preprint

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Adaptations to high latitude photoperiods have been under positive selection during the domestication of many short-day (SD) flowering crops. Photoperiod insensitivity (auto-flowering) in drug-type Cannabis sativa circumvents the need for SD flowering requirements making outdoor cultivation in high latitudes possible. However, the benefits of photoperiod insensitivity are counterbalanced by low cannabinoid contents and poor flower quality in auto-flowering genotypes. Despite recent legalization in some countries, a mechanistic understanding of photoperiod insensitivity in cannabis is still lacking. Herein, we identify a splice site mutation within PSEUDO-RESPONSE REGULATOR 37 (CsPRR37) in auto-flowering cannabis that causes photoperiod insensitivity. Using a combination of GWAS, fine mapping, and gene expression analyses, our results strongly indicate CsPRR37 as the most likely candidate for causing photoperiod insensitivity. Research into the pervasiveness of this mutation and others effecting flowering time will help elucidate its domestication history and advance cannabis breeding towards a more sustainable outdoor cultivation system.

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Artificial selection in the expansion of rice cultivation

Cited by 13 publications

References 56 publications

Reloading DNA History in Rice Domestication

Reloading DNA History in Rice Domestication

Loss of daylength sensitivity by splice site mutation in Cannabis pseudo‐response regulator

Loss of daylength sensitivity by splice site mutation in Cannabis

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