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<p class="MsoNormal"><span style="font-size:11.0pt">Dear all,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Please join us in Marley 230 on Tuesday, Nov. 19 at 4:00 PM for a seminar presented by Heng Chen from the School of Plant Sciences, University of Arizona.
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt"><a href="https://arizona.zoom.us/j/83044711714?pwd=IQ994mWIPwbsRKMnfF9sERx5sNtv4m.1">Zoom link</a>: https://arizona.zoom.us/j/83044711714 (password: SPLS24).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Refreshments will be provided in the Marley Lobby at 3:30 PM.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt">Title: </span></b><span style="font-size:11.0pt">How mating system impacts siren siRNA biology<b><o:p></o:p></b></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt">Abstract: </span></b><span style="font-size:11.0pt">The transition from outcrossing to self-fertilization (selfing) is often accompanied by a distinct set of floral morphological changes, which are known
as the selfing syndrome. The transition to selfing also profoundly affects the genome, including homozygosity and genomic conflicts. As selfing lineages become more homozygous, selfish genetic elements, such as transposons, lose their ability to spread across
different genetic backgrounds. Similarly, kin conflicts, common in outbreeders, diminish when parents and offspring are genetically identical. Recent evidence suggests that many genomic conflicts are regulated epigenetically, leading to the hypothesis of an
"epigenomic selfing syndrome." <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt">This research employs three closely related species with different mating systems,
<i>Capsella grandiflora</i> (<i>Cg</i>, an outbreeder), <i>Capsella rubella</i> (<i>Cr</i>, an inbreeder) and
<i>Capsella orientalis</i> (<i>Co</i>, an inbreeder), as models. It combines genetic and epigenetic approaches to investigate the hypothesis that there are consistent and predictable changes in epigenomes following the transition to selfing, and that these
changes are associated with RNA-directed DNA Methylation (RdDM). In this seminar, I will discuss the difference among three
<i>Capsella</i> genomes and initial comparisons of RdDM regulation of their transcriptomes.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:10.0pt;font-family:"Courier New";mso-ligatures:none">===============================================================<br>
</span><b><span style="font-size:20.0pt;font-family:"Vladimir Script";mso-ligatures:none">Zhongguo Xiong</span></b><span style="font-size:10.0pt;font-family:"Courier New";mso-ligatures:none"> <br>
School of Plant Sciences BIO5 Institute<br>
BIO5 Email: <span style="color:blue"><a href="mailto:zxiong@arizona.edu"><span style="color:blue">zxiong@arizona.edu</span></a></span>
<br>
Phone: (520)-621-9869<br>
Forbes 303, P.O. box 210036 Fax: (520)-621-7186<br>
University of Arizona <br>
Tucson, AZ 85721-0036 <span style="color:blue"><a href="http://ag.arizona.edu/~zxiong"><span style="color:blue">http://ag.arizona.edu/~zxiong</span></a></span><br>
===============================================================</span><span style="font-size:11.0pt;mso-ligatures:none"><o:p></o:p></span></p>
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