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Introduction: The seeds of wild pea () exhibit marked physical dormancy due to impermeability of the seed coat to water, and the loss of this dormancy is thought to have been critical for domestication. Wild pea seed coats are also notably thick and rough, traits that have also reduced during domestication and are anecdotally linked to increased permeability. However, how these traits specifically interact with permeability is unclear.
Methods: To investigate this, we examined the genetic control of differences in seed coat characteristics between wild ssp. and a non-dormant domesticated accession in a recombinant inbred population. QTL effects were confirmed and their locations refined in segregating F populations.
Results: In this population we found a moderate correlation between testa thickness and permeability, and identified loci that affect them independently, suggesting no close functional association. However, the major loci affecting both testa thickness and permeability collocated closely with Mendel's pigmentation locus A, suggesting flavonoid compounds under its control might contribute significantly to both traits. We also show that seed coat roughness is oligogenic in this population, with the major locus independent of both testa thickness and permeability, suggesting selection for smooth seed was unlikely to be due to effects on either of these traits.
Discussion: Results indicate loss of seed coat dormancy during domestication was not primarily driven by reduced testa thickness or smooth seededness. The close association between major permeability and thickness QTL and Mendel's 'A' warrant further study, particularly regarding the role of flavonoids.
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http://dx.doi.org/10.3389/fpls.2024.1359226 | DOI Listing |
Shrub encroachment can alter the structure and function of grassland ecosystems, leading to their degradation. Therefore, population regeneration dynamics after shrub encroachment on the influence of grassland should not be ignored. , as a pioneer species, has significantly encroached with large areas on the Qinghai-Tibetan Plateau (QTP) due to climate change and over-grazing.
View Article and Find Full Text PDFPlant Sci
December 2024
Department of Life Science, Sogang University, Seoul 04107, Republic of Korea. Electronic address:
Suberin is an extracellular hydrophobic polymer deposited in seed coats that acts as a barrier to regulate the movement of ions, water, and gases, and protects seeds against pathogens. However, the molecular mechanisms underlying suberin deposition in the seed coat remain unknown. In this study, the in planta role of ATP-binding cassette G23 (ABCG23) was investigated in the Arabidopsis seed coat.
View Article and Find Full Text PDFBMC Genomics
December 2024
State Key Laboratory of Swine and Poultry Breeding Industry, National Engineering Research Center for Breeding Swine Industry, Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, 510642, China.
Background: Indigenous pig breeds in China have accumulated significant genetic diversity due to regional selection pressures. Investigating the selection signatures of these populations helps to understand their adaptive evolution and contributes to genetic improvement programs.
Results: We collected whole-genome sequencing data from 133 individuals, including South China and North China indigenous pigs and Asian wild boars.
Genome Biol
December 2024
State Key Laboratory of Crop Genetics and Germplasm Enhancement and Utilization, Jiangsu Collaborative Innovation Center for Modern Crop Production, Nanjing Agricultural University, No. 1 Weigang, Nanjing, Jiangsu, 210095, China.
Background: Transcription factors (TFs) bind regulatory genomic regions to orchestrate spatio-temporal expression of target genes. Global dissection of the cistrome is critical for elucidating transcriptional networks underlying complex agronomic traits in crops.
Results: Here, we generate a comprehensive genome-wide binding map for 148 TFs using DNA affinity purification sequencing in soybean.
Ann Bot
December 2024
Laboratório de Anatomia Vegetal (LAVeg), Federal University of Rio Grande do Sul, Av. Bento Gonçalves, 9500, Porto Alegre, RS, Brazil.
Background And Aims: Recent studies have documented numerous morphoanatomical variations for the seed coat in Bromeliaceae. However, the structural diversity and character evolution of the embryo within this family remain largely unexplored. Given the embryo's significance in plant diversification, this research aims to investigate the morphology and key anatomical features of Bromeliaceae embryos, providing insights into character evolution, taxonomic applications, and reproductive biology.
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