Recent Advances in Molecular Research in Rice: Agronomically Important Traits

Hori, Kiyosumi; Shenton, Matthew R.

doi:10.3390/ijms21175945

Cited by 4 publications

(5 citation statements)

References 26 publications

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“…In total, 19 and 14 SNPs in protein-coding genes of the ‘Lo7’ assembly associated with GYD and TGW were identified as orthologs of cloned rice QTL [ 60 ]. These results demonstrate that integration and advancement of fundamental and applied breeding and research from rice [ 122 , 123 , 124 , 125 ] in the rye reference genome sequences [ 41 , 42 ] supports our understanding how the genome builds, maintains, and operates rye.…”

Section: Approaching Rye Genes Controlling Grain Yieldmentioning

confidence: 57%

Improving Yield and Yield Stability in Winter Rye by Hybrid Breeding

Hackauf

Siekmann²,

Fromme³

2022

Plants

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Rye is the only cross-pollinating small-grain cereal. The unique reproduction biology results in an exceptional complexity concerning genetic improvement of rye by breeding. Rye is a close relative of wheat and has a strong adaptation potential that refers to its mating system, making this overlooked cereal readily adjustable to a changing environment. Rye breeding addresses the emerging challenges of food security associated with climate change. The systematic identification, management, and use of its valuable natural diversity became a feasible option in outbreeding rye only following the establishment of hybrid breeding late in the 20th century. In this article, we review the most recent technological advances to improve yield and yield stability in winter rye. Based on recently released reference genome sequences, SMART breeding approaches are described to counterbalance undesired linkage drag effects of major restorer genes on grain yield. We present the development of gibberellin-sensitive semidwarf hybrids as a novel plant breeding innovation based on an approach that is different from current methods of increasing productivity in rye and wheat. Breeding of new rye cultivars with improved performance and resilience is indispensable for a renaissance of this healthy minor cereal as a homogeneous commodity with cultural relevance in Europe that allows for comparatively smooth but substantial complementation of wheat with rye-based diets, supporting the necessary restoration of the balance between human action and nature.

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Section: Approaching Rye Genes Controlling Grain Yieldmentioning

confidence: 57%

Improving Yield and Yield Stability in Winter Rye by Hybrid Breeding

Hackauf

Siekmann²,

Fromme³

2022

Plants

View full text Add to dashboard Cite

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“…Therefore, these genes might also be associated with flowering time regulation in rice in response to ambient temperature fluctuations. Recently developed techniques in molecular biology can reveal the complex fundamental mechanisms involved in the control of the agronomically important traits [42]. To reveal the degree of conservation of the flowering-time pathway among rice, Arabidopsis and temperate cereal crops, it is necessary to identify more participant genes and to perform further molecular functional studies such as of phosphorylation, methylation and acetylation status at both gene and protein levels and to integrate those modifications into the gene pathway for flowering time regulation in rice.…”

Section: Integration Of Thermal Response Into Photoperiod Flowering Pathwaymentioning

confidence: 99%

Genetic Elucidation for Response of Flowering Time to Ambient Temperatures in Asian Rice Cultivars

Hori

Sugiyama

Nagata

et al. 2021

IJMS

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Climate resilience of crops is critical for global food security. Understanding the genetic basis of plant responses to ambient environmental changes is key to developing resilient crops. To detect genetic factors that set flowering time according to seasonal temperature conditions, we evaluated differences of flowering time over years by using chromosome segment substitution lines (CSSLs) derived from japonica rice cultivars “Koshihikari” × “Khao Nam Jen”, each with different robustness of flowering time to environmental fluctuations. The difference of flowering times in 9 years’ field tests was large in “Khao Nam Jen” (36.7 days) but small in “Koshihikari” (9.9 days). Part of this difference was explained by two QTLs. A CSSL with a “Khao Nam Jen” segment on chromosome 11 showed 28.0 days’ difference; this QTL would encode a novel flowering-time gene. Another CSSL with a segment from “Khao Nam Jen” in the region around Hd16 on chromosome 3 showed 23.4 days” difference. A near-isogenic line (NIL) for Hd16 showed 21.6 days’ difference, suggesting Hd16 as a candidate for this QTL. RNA-seq analysis showed differential expression of several flowering-time genes between early and late flowering seasons. Low-temperature treatment at panicle initiation stage significantly delayed flowering in the CSSL and NIL compared with “Koshihikari”. Our results unravel the molecular control of flowering time under ambient temperature fluctuations.

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“…Productivity improvements for rice are likely to come from advances in rice genetics, biotic and abiotic stress responses, and developmental biology [ 16 , 17 ]. In addition, rice is a model plant for monocotyledons with a growing number of rice genomic sequences, wider genetic diversity, and a long history of detailed study [ 18 , 19 , 20 ]. To improve our understanding of rice developmental biology, observation of cellular arrangements in 3D is a powerful tool; however, studies using tissue clearing and 3D imaging of rice have not been widely used due to the lack of established protocols.…”

Section: Introductionmentioning

confidence: 99%

Whole-Tissue Three-Dimensional Imaging of Rice at Single-Cell Resolution

Sato

Akashi

Sakamoto

et al. 2021

IJMS

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The three-dimensional (3D) arrangement of cells in tissues provides an anatomical basis for analyzing physiological and biochemical aspects of plant and animal cellular development and function. In this study, we established a protocol for tissue clearing and 3D imaging in rice. Our protocol is based on three improvements: clearing with iTOMEI (clearing solution suitable for plants), developing microscopic conditions in which the Z step is optimized for 3D reconstruction, and optimizing cell-wall staining. Our protocol successfully 3D imaged rice shoot apical meristems, florets, and root apical meristems at cellular resolution throughout whole tissues. Using fluorescent reporters of auxin signaling in rice root tips, we also revealed the 3D distribution of auxin signaling events that are activated in the columella, quiescent center, and multiple rows of cells in the stele of the root apical meristem. Examination of cells with higher levels of auxin signaling revealed that only the central row of cells was connected to the quiescent center. Our method provides opportunities to observe the 3D arrangement of cells in rice tissues.

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Recent Advances in Molecular Research in Rice: Agronomically Important Traits

Abstract: Rice (Oryza sativa L [...]

Cited by 4 publications

References 26 publications

Improving Yield and Yield Stability in Winter Rye by Hybrid Breeding

Improving Yield and Yield Stability in Winter Rye by Hybrid Breeding

Genetic Elucidation for Response of Flowering Time to Ambient Temperatures in Asian Rice Cultivars

Whole-Tissue Three-Dimensional Imaging of Rice at Single-Cell Resolution

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