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Seed coat fragments counting and sizing in card web

Gourlot J.P., Frydrych R., Héquet E., Thollard F., Constantin O., Bachelier B.. 1995. In : Actes des journées coton du CIRAD-CA. Montpellier : CIRAD-CA, p. 74-81. Journées coton du CIRAD-CA, 1995-07-24/1995-07-27, Montpellier (France).

A method to differentiate cultivars depending on their SCF contents on yarn was developped in CIRAD CA using a GGP Uster Eveness Tester. Results indicate a high SCF heritability, but fabrication of yarn is too costly to be used for breeding programs. So, a new method, using image analysis, bas been developped for counting and sizing up SCF on card web. SCF counts were made on card web and compared to those obtained by Uster Tester mon 20 tex, 27 tex, 37 tex yarns for 30 cottons. Number of SCF on yarn can be predicted with R2 as greal as 80 %.

Mots-clés : coton; graine de coton; technologie; variété; fibre; qualité; instrument de mesure; fil; coque de coton

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