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Theoretical and Applied Genetics

@theorapplgenet.bsky.social

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Theoretical & Applied Genetics communicates key discoveries and news in plant genetics, genomics and plant breeding https://link.springer.com/journal/122

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Theoretical and Applied Genetics @theorapplgenet.bsky.social · Sep 2

Using identity-by-descent mapping, this research identifies genomic regions and candidate genes under selection pressure during lettuce diversification. The analysis reveals how selective breeding has driven morphological differentiation across cultivated lettuce types.

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Mapping of identity by descent reveals genes shaping morphology and biological traits in the cultivated lettuce varieties during the long-term crossbreeding

Theoretical and Applied Genetics @theorapplgenet.bsky.social · Sep 1

Comparative genomic analysis of two safflower cultivars using chromosome-scale assemblies reveals genetic variation underlying key agronomic traits including fatty acid profiles, flowering phenology, and flavonoid metabolism.

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The chromosome-scale genomes of two cultivated safflowers (Carthamus tinctorius) provide insights into the genetic diversity resulting from domestication

Theoretical and Applied Genetics @theorapplgenet.bsky.social · Aug 31

This research maps stable QTLs with pleiotropic effects on essential element accumulation in wheat grain. The identification of these multi-trait QTL offers molecular markers and breeding targets for developing wheat cultivars with enhanced nutritional profiles.

Article:

Stable pleotropic loci controlling the accumulation of multiple nutritional elements in wheat

Theoretical and Applied Genetics @theorapplgenet.bsky.social · Aug 31

Long-term crossbreeding has shaped the distinct morphology and traits of cultivated lettuce types. This study applies identity-by-descent mapping to reveal key genomic regions under selection across major lettuce varieties, offering insights into trait evolution and diversity.

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Mapping of identity by descent reveals genes shaping morphology and biological traits in the cultivated lettuce varieties during the long-term crossbreeding

Theoretical and Applied Genetics @theorapplgenet.bsky.social · Aug 30

Researchers have fine-mapped a major genetic locus controlling subgynoecy in chieh-qua.These findings provide valuable molecular tools for developing female-biased breeding lines to optimize hybrid seed production and crop yields.

Article:

Fine mapping and identification of CqMYB62 as the subgynoecy gene in chieh-qua (Benincasa hispida Cogn. var. Chieh-qua How)

Theoretical and Applied Genetics @theorapplgenet.bsky.social · Aug 30

Domestication shapes crop diversity through adaptations to local environments. This study presents chromosome-scale genomes of two cultivated safflower lines, revealing genetic differences in traits like fatty acid composition, flowering time, and flavonoid biosynthesis.

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The chromosome-scale genomes of two cultivated safflowers (Carthamus tinctorius) provide insights into the genetic diversity resulting from domestication

Theoretical and Applied Genetics @theorapplgenet.bsky.social · Aug 29

New research demonstrates that targeted deletion of α-gliadin genes on chromosome 6D can simultaneously improve gluten functionality and reduce immunogenic epitopes associated with celiac disease.

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Deletion of wheat alpha-gliadins from chromosome 6D improves gluten strength and reduces immunodominant celiac disease epitopes

Theoretical and Applied Genetics @theorapplgenet.bsky.social · Aug 29

Enhancing nutrient content in wheat is vital for improving food quality and security. This study identifies stable, pleiotropic QTL influencing the accumulation of multiple essential elements, providing a foundation for breeding nutritionally enhanced wheat varieties.

Article:

Stable pleotropic loci controlling the accumulation of multiple nutritional elements in wheat

Theoretical and Applied Genetics @theorapplgenet.bsky.social · Aug 28

QTL mapping identifies stable major locus on chromosome 3B conferring powdery mildew resistance in strawberry.

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A major QTL region associated with powdery mildew resistance in leaves and fruits of the reconstructed garden strawberry

Theoretical and Applied Genetics @theorapplgenet.bsky.social · Aug 28

Sex differentiation plays a key role in hybrid seed production and yield in cucurbit crops. This study fine-maps a major locus controlling subgynoecy in chieh-qua and identifies a strong candidate gene, offering new tools and insights for breeding female-biased lines.

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Fine mapping and identification of CqMYB62 as the subgynoecy gene in chieh-qua (Benincasa hispida Cogn. var. Chieh-qua How)

Theoretical and Applied Genetics @theorapplgenet.bsky.social · Aug 27

Targeted editing of Ghd7 and PRR37 regulatory regions fine-tunes heading date in elite rice varieties. Precision approach adjusts flowering time while enhancing yield potential.

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A major QTL region associated with powdery mildew resistance in leaves and fruits of the reconstructed garden strawberry

Theoretical and Applied Genetics @theorapplgenet.bsky.social · Aug 27

Balancing end-use quality and health concerns is a major challenge in wheat improvement. This study investigates the effects of deleting α-gliadin genes, revealing a promising strategy to enhance gluten strength while reducing celiac disease-triggering epitopes.

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Deletion of wheat alpha-gliadins from chromosome 6D improves gluten strength and reduces immunodominant celiac disease epitopes

Theoretical and Applied Genetics @theorapplgenet.bsky.social · Aug 26

Pangenome reveals structural variant-driven variation in expression of in winter oilseed rape. Framework enables population-scale SV-eQTL discovery beyond traditional SNP-based approaches - major advance for functional genomics.

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Graphical pangenomics-enabled characterization of structural variant impact on gene expression in Brassica napus

Theoretical and Applied Genetics @theorapplgenet.bsky.social · Aug 26

Powdery mildew is a major challenge in strawberry production. This study maps resistance QTLs in a reconstructed breeding population, identifying a stable major locus on chromosome 3B and providing new genetic resources for disease-resilient strawberry breeding.

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A major QTL region associated with powdery mildew resistance in leaves and fruits of the reconstructed garden strawberry

Theoretical and Applied Genetics @theorapplgenet.bsky.social · Aug 25

Multi-population mapping approach reveals genetic basis of plant height and general combining ability in maize. Study integrates inbred, hybrid & F2 data across diverse backgrounds to optimize breeding for plant architecture.

Theoretical and Applied Genetics @theorapplgenet.bsky.social · Aug 25

Tuning heading date is essential for optimising yield and adaptability in elite rice varieties. This study uses targeted editing of regulatory regions in Ghd7 and PRR37 to adjust flowering time and enhance yield potential, offering new strategies for precision breeding in rice.

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Improving yield-related traits by editing the promoter and distal regulatory region of heading date genes Ghd7 and PRR37 in elite rice variety Mei Xiang Zhan 2

Theoretical and Applied Genetics @theorapplgenet.bsky.social · Aug 24

Multi-environment GWAS reveals genetic architecture of 19 agronomic traits in broomcorn millet. Study maps loci controlling growth, development & yield components.

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A genome-wide association study reveals the genetic architecture of 19 agronomic traits in broomcorn millet (Panicum miliaceum L.)

Theoretical and Applied Genetics @theorapplgenet.bsky.social · Aug 24

Structural variants play a major role in shaping gene expression, yet they’re often overlooked in SNP-based analyses. This study uses a pangenome graph to explore SV-driven expression variation in winter oilseed rape.

Article:

Graphical pangenomics-enabled characterization of structural variant impact on gene expression in Brassica napus

Theoretical and Applied Genetics @theorapplgenet.bsky.social · Aug 23

Penalized factorial regression model efficiently predicts genotype performance across environments. Achieves competitive accuracy with lower computational complexity than deep learning approaches.

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Penalized factorial regression as a flexible and computationally attractive reaction norm model for prediction in the presence of GxE

Theoretical and Applied Genetics @theorapplgenet.bsky.social · Aug 23

Understanding general combining ability is key to breeding maize with optimal plant architecture. This study integrates multiple mapping approaches across various populations to explore the genetic basis of plant height and its combining ability in diverse genetic backgrounds.

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Integrative mapping in large inbred and hybrid association panels along with an F2 population advanced a novel understanding of general combining ability for plant height in maize

Theoretical and Applied Genetics @theorapplgenet.bsky.social · Aug 22

Doubled haploid technology accelerates maize inbred line development for hybrid breeding. Review covers in vitro/in vivo DH methods, current challenges & recent advances driving more efficient cultivar development.

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In vitro- and in vivo-based approaches for doubled haploid production in Zea mays L.: challenges and opportunities

Theoretical and Applied Genetics @theorapplgenet.bsky.social · Aug 22

Uncovering the genetic basis of agronomic traits is key to advancing molecular breeding in broomcorn millet. This study uses genome-wide association mapping across multiple environments to explore the architecture of 19 traits related to growth, development, and yield.

Article:

A genome-wide association study reveals the genetic architecture of 19 agronomic traits in broomcorn millet (Panicum miliaceum L.)

Theoretical and Applied Genetics @theorapplgenet.bsky.social · Aug 21

Targeted mutagenesis uncovers genetic mechanisms controlling branch angle in rapeseed. Study develops new tools to engineer compact, high-performing cultivars with optimized architecture for enhanced yield and harvest efficiency.

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Targeted mutagenesis and functional marker development of two Bna.TAC1s conferring novel rapeseed germplasm with compact architecture

Theoretical and Applied Genetics @theorapplgenet.bsky.social · Aug 21

Predicting genotype performance across environments remains a key challenge in plant breeding. This study introduces penalized factorial regression as a computationally efficient reaction norm model, offering competitive accuracy with lower complexity.

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Penalized factorial regression as a flexible and computationally attractive reaction norm model for prediction in the presence of GxE

Theoretical and Applied Genetics @theorapplgenet.bsky.social · Aug 20

GWAS dissects genetic basis of lignocellulose content in wheat stems. Key for lodging resistance & bioenergy potential. Novel loci identified provide molecular tools for improving stem quality & strength in breeding programs.

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Deciphering the regulatory network of lignocellulose biosynthesis in bread wheat through genome-wide association studies