Submitted to: Meeting Proceedings
Publication Type: Proceedings
Publication Acceptance Date: 3/1/2013
Publication Date: 4/8/2013
Citation: Xu, Y., Jenkins, J.N., McCarty Jr, J.C., Wu, J. 2013. Variation analysis for fiber quality traits among different positions in eight Upland cotton cultivars. In: W. Song, editors. Proceedings Twenty-fourth Annual Kansas State University Conference on Applied Statistics in Agriculture, April 29-May 1, 2012, Manhattan, Kansas. p. 309-320. Interpretive Summary: Stability of fiber quality of bolls harvested from a cotton plant is desirable. This research measured fiber quality across nodes and fruiting positions for eight cultivars of cotton when grown at Mississippi State, MS. Node and fruiting position were used as environments since each combination of these began boll growth at different times during the season. Three methods of measuring stability of fiber quality were used: Francis and Kannenberg’s (F-K), Finlay and Wilkinson (F-W), and additive main effect and multiplication interaction (AMMI). Cultivar ST 213 was more stable for fiber micronaire. Cultivar McNair 235 was stable for 2.5 and 50% fiber span length. The cultivars Deltapine nectariless smoothleaf and DES 119 were more stable for fiber elongation. Cultivar CAMD-E was more stable for fiber strength. The three measurements of stability are computed differently, yet each gave comparable results. However, the AMMI method was more sensitive for determining interaction effects.
Technical Abstract: Equivalency of fiber quality within a plant of upland cotton, Gossypium hirsutum L., is very important. There are several traits within a plant that can be used to measure fiber quality and five of those traits will be investigated. Eight representative upland cultivars were grown at the Plant Science Research Farm at Mississippi State University in 1986 and five fiber traits: micronaire, fiber elongation, 2.5% and 50% span length, and fiber strength, were measured at different plant locations. The analysis of the study was modeled after a crop stability analysis with plant locations being treated as environments in the analysis. Three methods of stability analyses were investigated: Francis and Kannenberg’s (F-K), Finlay and Wilkinson’s (F-W), and additive main effect and multiplication interaction (AMMI). The results showed that cultivar ST213 was stable for micronaire, MC235 for fiber span length, DPNSL and DES119 for fiber elongation, and CAMD-E for fiber strength.