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2 results for “apical dominance”
Population Genomics Analysis of 30 Samples from Each of Multiple Populations Reveals Signatures of Selection from Breeding for Rapid Growth and Apical Dominance in Paulownia fortunei
<p><i>Paulownia fortunei</i> is an ecologically and economically valuable tree cultivated for its rapid growth and high-quality timber. To enhance <i>Paulownia</i> germplasm, we have developed the elite variety QingT with patented advantages in growth rate and apical dominance. To illuminate the genetic basis of QingT's superior traits, here we harness comparative population genomics to analyze genomic variation patterns between QingT and common <i>Paulownia</i>. We performed whole-genome re-sequencing of 30 QingT and 30 common samples, detecting 15.6 million SNPs and 2.6 million indels. Phylogeny and population structure analyses robustly partitioned common and QingT into distinct groups which indicate robust genome stabilization. QingT exhibited reduced heterozygosity and linkage disequilibrium decay compared to common <i>Paulownia</i>, reflecting high recombination, indicating hybridizing effects with common white-flowered string is the source of its patented advantages. Genome selection scans uncovered 25 regions of 169 genes with elevated nucleotide diversity, indicating selection sweeps among groups. Functional analysis of sweep genes revealed upregulation of ribosomal, biosynthesis and growth pathways in QingT, implicating enhanced protein production and developmental processes in its rapid growth phenotype. This study's insights comprehensively chart genomic variation during <i>Paulownia</i> breeding, localizing candidate loci governing agronomic traits, and underpinnings of future molecular breeding efforts to boost productivity. </p>
BrCHR39, a novel chromatin remodeling ATPase, positively regulates apical dominance in Brassica rapa
GEO Series GSE197974. Brassica rapa. 12 samples. Type: Expression profiling by high throughput sequencing.
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