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          <TitleText>Les ignames au Cameroun</TitleText>
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        <BiographicalNote>&lt;p&gt;Roland Dumont est un agronome du Cirad aujourd'hui retraité. Il eut le privilège d'être élève du professeur Jacques Miège. Plus de trente années de sa longue carrière africaine furent consacrées aux ignames cultivées et sauvages, notamment en approfondissant le savoir paysan sur ces thèmes.&lt;/p&gt;</BiographicalNote>
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        <Text language="fre">&lt;p&gt;La prospection des esp&amp;egrave;ces sauvages cultiv&amp;eacute;es d&amp;#39;igname &lt;em&gt;(Dioscorea&lt;/em&gt;) au Cameroun r&amp;eacute;v&amp;egrave;le que certaines d&amp;#39;entre elles n&amp;#39;ont jamais &amp;eacute;t&amp;eacute; signal&amp;eacute;es jusqu&amp;#39;alors. Les ignames du complexe &lt;em&gt;D. cayenensis-rotundata&lt;/em&gt; apparaissent tr&amp;egrave;s nombreuses et ont pu &amp;ecirc;tre class&amp;eacute;es gr&amp;acirc;ce &amp;agrave; des analyses enzymatiques et morphologiques. La diversit&amp;eacute; des formes sauvages exploitables en culture et les diff&amp;eacute;rentes pressions de s&amp;eacute;lection seraient &amp;agrave; l&amp;#39;origine de la variabilit&amp;eacute; de ce complexe. La situation agricole et &amp;eacute;conomique de l&amp;#39;igname au Cameroun et le choix des esp&amp;egrave;ces selon le contexte local constituent l&amp;rsquo;autre volet de cette &amp;eacute;tude.&lt;/p&gt;</Text>
        <Text language="eng">&lt;p&gt;Surveys of wild yam &lt;em&gt;(Dioscorea)&lt;/em&gt; species grown in &lt;st1:country-region&gt;Cameroon &lt;/st1:country-region&gt;revealed some that had never previously been reported. Yams of the complex &lt;em&gt;D. cayenensis-rotundata&lt;/em&gt; proved to be very numerous and were classified through enzymatic and morhological analyses. The diversity of the wild forms suitable for cultivation and the different types of selection pressure exerted account for the variability of this complex.The agricultural and economic situation of yams in &lt;st1:country-region&gt;Cameroon&lt;/st1:country-region&gt;and the choice of species based on local conditions were also covered in the study.&lt;/p&gt;</Text>
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        <Text>La prospection des espèces sauvages cultivées d'igname (Dioscorea) au Cameroun révèle que certaines d'entre elles n'ont jamais été signalées jusqu'alors. Les ignames du complexe D. cayenensis-rotundata apparaissent très nombreuses et ont pu être classées grâce à des analyses enzymatiques et morphologiques.</Text>
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        <Text>&lt;p class="MsoNormal" style="margin: 0cm 0cm 0pt;"&gt;&lt;span style="font-size: 14pt;"&gt;&lt;font face="Times New Roman"&gt;Introduction&lt;o:p&gt;&lt;/o:p&gt;&lt;/font&gt;&lt;/span&gt;&lt;/p&gt;&lt;p class="MsoNormal" style="margin: 0cm 0cm 0pt;"&gt;&lt;span style="font-size: 14pt;"&gt;&lt;o:p&gt;&lt;font face="Times New Roman"&gt;&amp;nbsp;&lt;/font&gt;&lt;/o:p&gt;&lt;/span&gt;&lt;/p&gt;&lt;p class="MsoNormal" style="margin: 0cm 0cm 0pt;"&gt;&lt;span style="font-size: 14pt;"&gt;&lt;font face="Times New Roman"&gt;Premi&amp;egrave;re partie &amp;ndash; Inventaire&lt;o:p&gt;&lt;/o:p&gt;&lt;/font&gt;&lt;/span&gt;&lt;/p&gt;&lt;p class="MsoNormal" style="margin: 0cm 0cm 0pt;"&gt;&lt;o:p&gt;&lt;font face="Times New Roman" size="3"&gt;&amp;nbsp;&lt;/font&gt;&lt;/o:p&gt;&lt;/p&gt;&lt;p class="MsoNormal" style="margin: 0cm 0cm 0pt 18pt; text-indent: -18pt;"&gt;&lt;span style="font-family: Symbol;"&gt;&lt;span style=""&gt;&lt;font size="3"&gt;&amp;middot;&lt;/font&gt;&lt;span style="font: 7pt 'Times New Roman';"&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp; &lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;font face="Times New Roman" size="3"&gt;R&amp;eacute;alisation de l&amp;rsquo;&amp;eacute;tude&lt;/font&gt;&lt;/p&gt;&lt;p class="MsoNormal" style="margin: 0cm 0cm 0pt 18pt;"&gt;&lt;font face="Times New Roman" size="3"&gt;La bibliographie&lt;/font&gt;&lt;/p&gt;&lt;p class="MsoNormal" style="margin: 0cm 0cm 0pt 36pt; text-indent: -18pt;"&gt;&lt;font face="Times New Roman" size="3"&gt;Les missions de terrain&lt;/font&gt;&lt;/p&gt;&lt;p class="MsoNormal" style="margin: 0cm 0cm 0pt 18pt;"&gt;&lt;font face="Times New Roman" size="3"&gt;Les exp&amp;eacute;rimentations&lt;/font&gt;&lt;/p&gt;&lt;p class="MsoNormal" style="margin: 0cm 0cm 0pt;"&gt;&lt;o:p&gt;&lt;font face="Times New Roman" size="3"&gt;&amp;nbsp;&lt;/font&gt;&lt;/o:p&gt;&lt;/p&gt;&lt;p class="MsoNormal" style="margin: 0cm 0cm 0pt 36pt; text-indent: -36pt;"&gt;&lt;span style="font-family: Symbol;"&gt;&lt;span style=""&gt;&lt;font size="3"&gt;&amp;middot;&lt;/font&gt;&lt;span style="font: 7pt 'Times New Roman';"&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp; 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        <Text language="fre">&lt;p&gt;La prospection des esp&amp;egrave;ces sauvages cultiv&amp;eacute;es d&amp;#39;igname &lt;em&gt;(Dioscorea&lt;/em&gt;) au Cameroun r&amp;eacute;v&amp;egrave;le que certaines d&amp;#39;entre elles n&amp;#39;ont jamais &amp;eacute;t&amp;eacute; signal&amp;eacute;es jusqu&amp;#39;alors. Les ignames du complexe &lt;em&gt;D. cayenensis-rotundata&lt;/em&gt; apparaissent tr&amp;egrave;s nombreuses et ont pu &amp;ecirc;tre class&amp;eacute;es gr&amp;acirc;ce &amp;agrave; des analyses enzymatiques et morphologiques. La diversit&amp;eacute; des formes sauvages exploitables en culture et les diff&amp;eacute;rentes pressions de s&amp;eacute;lection seraient &amp;agrave; l&amp;#39;origine de la variabilit&amp;eacute; de ce complexe. La situation agricole et &amp;eacute;conomique de l&amp;#39;igname au Cameroun et le choix des esp&amp;egrave;ces selon le contexte local constituent l&amp;rsquo;autre volet de cette &amp;eacute;tude.&lt;/p&gt;</Text>
        <Text language="eng">&lt;p&gt;Surveys of wild yam &lt;em&gt;(Dioscorea)&lt;/em&gt; species grown in &lt;st1:country-region&gt;Cameroon &lt;/st1:country-region&gt;revealed some that had never previously been reported. Yams of the complex &lt;em&gt;D. cayenensis-rotundata&lt;/em&gt; proved to be very numerous and were classified through enzymatic and morhological analyses. The diversity of the wild forms suitable for cultivation and the different types of selection pressure exerted account for the variability of this complex.The agricultural and economic situation of yams in &lt;st1:country-region&gt;Cameroon&lt;/st1:country-region&gt;and the choice of species based on local conditions were also covered in the study.&lt;/p&gt;</Text>
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        <Text>La prospection des espèces sauvages cultivées d'igname (Dioscorea) au Cameroun révèle que certaines d'entre elles n'ont jamais été signalées jusqu'alors. Les ignames du complexe D. cayenensis-rotundata apparaissent très nombreuses et ont pu être classées grâce à des analyses enzymatiques et morphologiques.</Text>
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        <Text language="fre">&lt;p&gt;La prospection des esp&amp;egrave;ces sauvages cultiv&amp;eacute;es d&amp;#39;igname &lt;em&gt;(Dioscorea&lt;/em&gt;) au Cameroun r&amp;eacute;v&amp;egrave;le que certaines d&amp;#39;entre elles n&amp;#39;ont jamais &amp;eacute;t&amp;eacute; signal&amp;eacute;es jusqu&amp;#39;alors. Les ignames du complexe &lt;em&gt;D. cayenensis-rotundata&lt;/em&gt; apparaissent tr&amp;egrave;s nombreuses et ont pu &amp;ecirc;tre class&amp;eacute;es gr&amp;acirc;ce &amp;agrave; des analyses enzymatiques et morphologiques. La diversit&amp;eacute; des formes sauvages exploitables en culture et les diff&amp;eacute;rentes pressions de s&amp;eacute;lection seraient &amp;agrave; l&amp;#39;origine de la variabilit&amp;eacute; de ce complexe. La situation agricole et &amp;eacute;conomique de l&amp;#39;igname au Cameroun et le choix des esp&amp;egrave;ces selon le contexte local constituent l&amp;rsquo;autre volet de cette &amp;eacute;tude.&lt;/p&gt;</Text>
        <Text language="eng">&lt;p&gt;Surveys of wild yam &lt;em&gt;(Dioscorea)&lt;/em&gt; species grown in &lt;st1:country-region&gt;Cameroon &lt;/st1:country-region&gt;revealed some that had never previously been reported. Yams of the complex &lt;em&gt;D. cayenensis-rotundata&lt;/em&gt; proved to be very numerous and were classified through enzymatic and morhological analyses. The diversity of the wild forms suitable for cultivation and the different types of selection pressure exerted account for the variability of this complex.The agricultural and economic situation of yams in &lt;st1:country-region&gt;Cameroon&lt;/st1:country-region&gt;and the choice of species based on local conditions were also covered in the study.&lt;/p&gt;</Text>
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        <Text>La prospection des espèces sauvages cultivées d'igname (Dioscorea) au Cameroun révèle que certaines d'entre elles n'ont jamais été signalées jusqu'alors. Les ignames du complexe D. cayenensis-rotundata apparaissent très nombreuses et ont pu être classées grâce à des analyses enzymatiques et morphologiques.</Text>
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