QTL Identification for Stem Fiber, Strength and Rot Resistance in a DH Population from an Alien Introgression of Brassica napus

Shao, Yiming; Shen, Yusen; He, Fangliang; Li, Zaiyun

doi:10.3390/plants11030373

Cited by 14 publications

(11 citation statements)

References 57 publications

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“…In this study, the S3307 treatment significantly increased the dry weight of the stem, leaf, pod, and whole plant (Figure 3). The deposition of structural carbohydrates (i.e., lignin, cellulose, hemicellulose) can lead to thicker stem tissue [45], affecting the elastic modulus of the stem and thus affecting its bending strength [46,47]. Zheng et al [10] and Hussain et al [45] believed that the content of lignin and cellulose in basal internodes was positively correlated with the lodging resistance of stems.…”

Section: Discussionmentioning

confidence: 99%

Positive Correlation of Lodging Resistance and Soybean Yield under the Influence of Uniconazole

Yan,

Shan,

Wang

et al. 2024

Agronomy

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Increasing planting density is one of the most effective ways to increase soybean yield, but supra-optimum density leads to an increase in the risk of lodged soybean. In this study, two varieties were selected. Heinong84 (lodging-susceptible variety, HN84) had planting densities of 200,000 plants/hm2, 300,000 plants/hm2, and 400,000 plants/hm2. Henong60 (lodging-resistant, HN60) had planting densities of 300,000 plants/hm2, 400,000 plants/hm2, and 500,000 plants/hm2. When the foliar application of uniconazole (50 mg/L) occurred at the beginning of the flowering stage (R1), the plant morphology, fiber composition, and mechanical properties of soybean internodes were determined at the podding and seed filling stages, and the yield was measured at the harvest stage. The results showed that spraying uniconazole at the R1 stage changed the morphology structure of soybean plants (i.e., plant height and petiole length reduction; stem diameter and leafstalk angle increase), improved the internode quality (i.e., increased breaking force, lignin content, cellulose content, hemicellulose content, and stem dry weight per unit length), and increased the number of grains per plant at the harvest stage. Thus, it is concluded that the application of uniconazole improved the plant population structure by changing the morphology of soybean plants, which was conducive to good light transmission and ventilation, improved the internode quality and lodging resistance, and increased the yield.

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Section: Discussionmentioning

confidence: 99%

Positive Correlation of Lodging Resistance and Soybean Yield under the Influence of Uniconazole

Yan,

Shan,

Wang

et al. 2024

Agronomy

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“…28,[41][42][43] Lignin, cellulose, hemicellulose and chitin are known to impact the elastic modulus, therefore affecting the flexural rigidity of the basal stem. 44,45 Silicon is an important structural component related to stem strength, and the application of silicon could increase the content of lignin in sclerenchyma cells, consequently improving stem strength in OSR crops. 46 Further studies should investigate cell wall structure in crops affected by CSFB to understand whether increased lodging risk is related to both physiological and biochemical changes.…”

Section: Discussionmentioning

confidence: 99%

“…Several studies have identified relationships between root characteristics and lodging risk. 26,[43][44][45][46][47][48] To understand the potential impact of CSFB on root anchorage further, inoculation experiments with different larval populations could be used to measure the impact of larvae on rooting traits.…”

Section: Discussionmentioning

confidence: 99%

Modelling the impact of cabbage stem flea beetle larval feeding on oilseed rape lodging risk

Wilkinson,

Coston,

Berry

et al. 2024

Pest Management Science

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BackgroundCabbage stem flea beetle (CSFB, Psylliodes chrysocephala L.) is a major pest of oilseed rape (OSR, Brassica napus L.) in the UK and low availability of effective chemical control has increased the need for integrated pest management approaches. The risk of OSR to lodging is strongly related to stem strength, however, the impact of CSFB larval tunnelling on stem strength and subsequent risk to stem lodging is unknown. The study investigated this by applying the Generalised Crop Lodging Model to conventionally grown OSR crops scored for varying levels of CSFB larval tunnelling. Lodging risk mitigation strategies including Plant Growth Regulators (PGR) and varying nitrogen regimes were tested under high CSFB larval pressure.ResultsStems of OSR plants were categorised by the proportion of visual damage (<5%; 5–25%; 26–50%; 51–75%; 75–100%). Stems of 26–50% damage had significantly lower breaking strengths and diameters compared to plants that scored <5%, with the associated reduction in stem failure windspeed equivalent to an order of magnitude increase in the risk of a lodging event occurring in the UK. PGR use reduced plant height and subsequently lodging risk variably across the sites.ConclusionEstimating the proportion of stem tunnelling alongside larval pressure may be a useful tool in considering the contribution of CSFB pressure to lodging risk. The research demonstrates that the use of canopy management principles to optimise canopy size through nitrogen management and PGR use may help offset increased lodging risk caused by CSFB tunnelling.This article is protected by copyright. All rights reserved.

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“…However, in this strategy, a large difference in the SSR resistance level is the main criterion for selecting parents, and backbone breeding parents that have undergone natural selection and strict artificial selection are rarely used as susceptible parents because their SSR resistance levels are not low enough. Using this strategy, numerous researchers have applied various methods for detecting SSR to discover a large number of SSR resistance-related QTLs in different growth stages of rapeseed ( Zhao et al., 2006 ; Yin et al., 2009 ; Mei et al., 2013 ; Wu et al., 2013 ; Li et al., 2015 ; Wei et al., 2016 ; Wu et al., 2016a ; Shao et al., 2022 ). However, the correlation between the results of different identification methods was low, as was the repeatability of QTLs mined in different studies; therefore, few or no QTLs have been applied to improve resistance to SSR ( Ding et al., 2021 ).…”

Section: Introductionmentioning

confidence: 99%

“…SSR resistance in rapeseed is related to the stem strength ( Shao et al., 2022 ), lignin content ( Cao et al., 2022 ), glucosinolate content ( Zhao and Meng, 2008 ), FT ( Wei et al., 2014 ; Wu et al., 2019 ; Zhang et al., 2019 ), and other traits ( Feng et al., 2021 ), and their interactions should be monitored during the improvement of SSR resistance. A study of the FT and SSR resistance of 521 rapeseed inbred lines revealed a significant negative correlation between the two traits, demonstrating that they had the closest relationship.…”

Section: Introductionmentioning

confidence: 99%

Quantitative trait locus mapping and improved resistance to sclerotinia stem rot in a backbone parent of rapeseed (Brassica napus L.)

Zhang

Li²,

Li³

et al. 2022

Front. Plant Sci.

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There are three main challenges to improving sclerotinia stem rot (SSR) resistance in rapeseed (Brassica napus L.). First, breeding materials such as the backbone parents have not been extensively investigated, making the findings of previous studies difficult to directly implement. Second, SSR resistance and flowering time (FT) loci are typically linked; thus, use of these loci requires sacrifice of the rapeseed growth period. Third, the SSR resistance loci in susceptible materials are often neglected, thereby reducing the richness of resistant resources. This study was conducted to investigate the stem resistance, disease index, and FT of a doubled haploid population consisting of 151 lines constructed from the backbone parent 19514A and conventional rapeseed cultivar ZY50 within multiple environments. Quantitative trait locus (QTL) mapping revealed 13 stem resistance QTLs, 9 disease index QTLs, and 20 FT QTLs. QTL meta-analysis showed that uqA04, uqC03.1, and uqC03.2 were repeatable SSR resistance QTLs derived from different parents but not affected by the FT. Based on these three QTLs, we proposed a strategy for improving the SSR resistance of 19514A and ZY50. This study improves the understanding of the resistance to rapeseed SSR and genetic basis of FT and demonstrates that SSR resistance QTLs can be mined from parents with a minimal resistance level difference, thereby supporting the application of backbone parents in related research and resistance improvement.

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QTL Identification for Stem Fiber, Strength and Rot Resistance in a DH Population from an Alien Introgression of Brassica napus

Cited by 14 publications

References 57 publications

Positive Correlation of Lodging Resistance and Soybean Yield under the Influence of Uniconazole

Positive Correlation of Lodging Resistance and Soybean Yield under the Influence of Uniconazole

Modelling the impact of cabbage stem flea beetle larval feeding on oilseed rape lodging risk

Quantitative trait locus mapping and improved resistance to sclerotinia stem rot in a backbone parent of rapeseed (Brassica napus L.)

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