Construction of a worldwide core collection of rapeseed and association analysis for waterlogging tolerance

Guo, Yiyi; Kuang, Liuhui; Xu, Ying; Yan, Tao; Jiang, Lixi; Dong, Jie; Wu, Dezhi

doi:10.1007/s10725-022-00862-5

Cited by 7 publications

(5 citation statements)

References 36 publications

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“…As shade response phenotypes may be closely related to high‐density planting tolerance, we hypothesized that early shade‐induced ASR might also have undergone selection during the breeding of B. napus varieties. To test this hypothesis, we used a global collection of 300 core re‐sequenced B. napus accessions (Wu et al, 2019; Guo et al, 2022). For each accession, we monitored the ASR by calculating the ratio of hypocotyl length under early shade versus WL (ES/WL), and the TSR by calculating the ratio of hypocotyl length under late shade versus WL (LS/WL).…”

Section: Resultsmentioning

confidence: 99%

Temporal control of the Aux/IAA genes BnIAA32 and BnIAA34 mediates Brassica napus dual shade responses

Li,

Guo,

Cao

et al. 2024

JIPB

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Precise responses to changes in light quality are crucial for plant growth and development. For example, hypocotyls of shade‐avoiding plants typically elongate under shade conditions. Although this typical shade‐avoidance response (TSR) has been studied in Arabidopsis (Arabidopsis thaliana), the molecular mechanisms underlying shade tolerance are poorly understood. Here we report that B. napus (Brassica napus) seedlings exhibit dual shade responses. In addition to the TSR, B. napus seedlings also display an atypical shade response (ASR), with shorter hypocotyls upon perception of early‐shade cues. Genome‐wide selective sweep analysis indicated that ASR is associated with light and auxin signaling. Moreover, genetic studies demonstrated that phytochrome A (BnphyA) promotes ASR, whereas BnphyB inhibits it. During ASR, YUCCA8 expression is activated by early‐shade cues, leading to increased auxin biosynthesis. This inhibits hypocotyl elongation, as young B. napus seedlings are highly sensitive to auxin. Notably, two non‐canonical AUXIN/INDOLE‐3‐ACETIC ACID (Aux/IAA) repressor genes, BnIAA32 and BnIAA34, are expressed during this early stage. BnIAA32 and BnIAA34 inhibit hypocotyl elongation under shade conditions, and mutations in BnIAA32 and BnIAA34 suppress ASR. Collectively, our study demonstrates that the temporal expression of BnIAA32 and BnIAA34 determines the behavior of B. napus seedlings following shade‐induced auxin biosynthesis.This article is protected by copyright. All rights reserved.

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Section: Resultsmentioning

confidence: 99%

Temporal control of the Aux/IAA genes BnIAA32 and BnIAA34 mediates Brassica napus dual shade responses

Li,

Guo,

Cao

et al. 2024

JIPB

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“…These abiotic stresses usually result in a decrease in yield and quality (Lohani et al, 2020). Current research on abiotic stresses mainly focuses on drought stress and salt stress responses in B. napus , while less progress has been made in cloning genes related to waterlogging stress and high temperature stress (Li et al, 2014; Guo et al, 2022; Li et al, 2022b). Here, we discuss the progress of research on genes regulating the response to drought stress and salt stress in B. napus .…”

Section: Abiotic Stressmentioning

confidence: 99%

“…There are numerous traits involved in the process of plant architecture improvement, but fewer related functional gene studies have been reported. Meanwhile, studies related to waterlogging, diseases and insects, silique shattering resistance, leaf color and efficient nutrient utilization in B. napus have mostly remained at the QTL level, with a few related genes being reported (Li et al, 2014; Zhang et al, 2017b; Hu et al, 2018; Feng et al, 2020; Guo et al, 2022; Li et al, 2022b; Zou and Fernando, 2023; Yang et al, 2023a; 2023b; Li et al, 2023d).…”

Section: Challeges and Perspectivesmentioning

confidence: 99%

Functional genomics of Brassica napus: Progress, challenges, and perspectives

Tan,

Han,

Dai

et al. 2024

JIPB

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Brassica napus, commonly known as rapeseed or canola, is a major oil crop contributing over 13% to the stable supply of edible vegetable oil worldwide. Identification and understanding the gene functions in the B. napus genome is crucial for genomic breeding. A group of genes controlling agronomic traits have been successfully cloned through functional genomics studies in B. napus. In this review, we present an overview of the progress made in the functional genomics of B. napus, including the availability of germplasm resources, omics databases and cloned functional genes. Based on the current progress, we also highlight the main challenges and perspectives in this field. The advances in the functional genomics of B. napus contribute to a better understanding of the genetic basis underlying the complex agronomic traits in B. napus and will expedite the breeding of high quality, high resistance and high yield in B. napus varieties.

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“…This core set can provide a starting point for enhancing genetic gains and employing phenomic and genomic tools in less time ( Tripathi et al., 2022 ). An economical, time-effective, and labor-saving approach for studying physiological or molecular response mechanisms using phenotypic traits of the core collection or trait-marker associations has been widely used ( Guo et al., 2022 ; Wang et al., 2022 ).…”

Section: Introductionmentioning

confidence: 99%

Salt tolerance evaluation and mini-core collection development in Miscanthus sacchariflorus and M. lutarioriparius

Tang,

Li,

Zerpa-Catanho

et al. 2024

Front. Plant Sci.

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Marginal lands, such as those with saline soils, have potential as alternative resources for cultivating dedicated biomass crops used in the production of renewable energy and chemicals. Optimum utilization of marginal lands can not only alleviate the competition for arable land use with primary food crops, but also contribute to bioenergy products and soil improvement. Miscanthus sacchariflorus and M. lutarioriparius are prominent perennial plants suitable for sustainable bioenergy production in saline soils. However, their responses to salt stress remain largely unexplored. In this study, we utilized 318 genotypes of M. sacchariflorus and M. lutarioriparius to assess their salt tolerance levels under 150 mM NaCl using 14 traits, and subsequently established a mini-core elite collection for salt tolerance. Our results revealed substantial variation in salt tolerance among the evaluated genotypes. Salt-tolerant genotypes exhibited significantly lower Na+ content, and K+ content was positively correlated with Na+ content. Interestingly, a few genotypes with higher Na+ levels in shoots showed improved shoot growth characteristics. This observation suggests that M. sacchariflorus and M. lutarioriparius adapt to salt stress by regulating ion homeostasis, primarily through enhanced K+ uptake, shoot Na+ exclusion, and Na+ sequestration in shoot vacuoles. To evaluate salt tolerance comprehensively, we developed an assessment value (D value) based on the membership function values of the 14 traits. We identified three highly salt-tolerant, 50 salt-tolerant, 127 moderately salt-tolerant, 117 salt-sensitive, and 21 highly salt-sensitive genotypes at the seedling stage by employing the D value. A mathematical evaluation model for salt tolerance was established for M. sacchariflorus and M. lutarioriparius at the seedling stage. Notably, the mini-core collection containing 64 genotypes developed using the Core Hunter algorithm effectively represented the overall variability of the entire collection. This mini-core collection serves as a valuable gene pool for future in-depth investigations of salt tolerance mechanisms in Miscanthus.

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Construction of a worldwide core collection of rapeseed and association analysis for waterlogging tolerance

Cited by 7 publications

References 36 publications

Temporal control of the Aux/IAA genes BnIAA32 and BnIAA34 mediates Brassica napus dual shade responses

Temporal control of the Aux/IAA genes BnIAA32 and BnIAA34 mediates Brassica napus dual shade responses

Functional genomics of Brassica napus: Progress, challenges, and perspectives

Salt tolerance evaluation and mini-core collection development in Miscanthus sacchariflorus and M. lutarioriparius

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