Distribution of Single Fiber Tensile Properties of Four Cotton Genotypes

Abstract

The distributions of breaking force and elongation of single fibers from five cultivated cotton varieties, African-51 ( G. herbaceum), Asian-163 ( G. arboreum), Maxxa and Texas Marker-1 ( G. hirsutum), and Pima-S7 ( G. barbadense), are studied. The range and distribution patterns of single fiber breaking force and elongation are significantly different for these cultivars and appear to be highly dependent on genotypes. Single fiber breaking force ranges from 16, 17, 20, 24, and 28 g for Pima-S7, TM-1, Maxxa, African-51, and Asian-163, respectively, and single fiber breaking elongation ranges from 16, 17, 18, 18, and 24% for these varieties. The single fiber breaking forces of Pima-S7 and TM-1 are symmetrically distributed, whereas those of the other three are asymmetrically distributed. African-51 and Maxxa have longer right tails, whereas Asian-163 has a longer left tail. Distributions of single fiber breaking elongation for all five varieties are asymmetrical and positively skewed, with the African and Asian cultivars having longer right tails. Within each cultivar, fibers of varying lengths have similar distributions in their breaking forces and elongation. This lack of relationship with fiber length suggests that these fibers’ tensile properties may be independent of length development, i.e., during elongation of the primary cell wall through the early stage of secondary cell wall synthesis. Single fiber breaking force and elongation are positively correlated ( r = 0.259 to 0.443) for all five varieties, with Pima having the highest correlation coefficient.

Diallel Analysis of Fiber Quality Traits with an Emphasis on Elongation in Upland Cotton

“…Data reported herein support conclusions of Bargeron (1998), Liu et al (2005), Riley (1997), and May and Jividen (1999) that Stelometer and HVI may be testing different stretch and break parameters of bundles of upland cotton fibers or differences may simply be due to the sample preparation, since fiber bundles prepared for Stelometer analyses contain fewer fibers <12.7 mm in length (fibers in the bundle extend from one end of the clamp to the next, about 15 mm). Stelometer values for fiber elongation at break of the five distinctive genotypes and F 1 progeny evaluated in this study were numerically lower than values derived by use of HVI instrumentation.…”

Stable transformation and expression of GhEXPA8 fiber expansin gene to improve fiber length and micronaire value in cotton

“…is one of the most important economic crops in the world, especially Gossypium hirsutum L., which provides more than 90% of the total cotton fiber produced. The fibers are the seed hairs of cotton, originating from the epidermal cells of the ovular surface (Liu et al, 2005 ). Cotton bolls are open at maturity, revealing soft masses of fibers.…”

Agrobacterium-Mediated Transformation of Cotton (Gossypium Hirsutum L.) Using Dmo Gene for Enhanced Tolerance Against Dicamba Pesticide

“…The main hindrance in cotton production is viruses, insects, weeds and pests. Weed is responsible for 25% loss of the cotton crop whereas insects are responsible for 20% loss (Liu et al, (2005). In our recent research, an attempt on Agrobacterium mediated transformation method was done to alter DMO gene in cotton.…”

“…The word Gossypium is derived from an Arabic word "goz" that literally means soft substances (Gledhill, 2008). Cotton is a cash crop majorly produces in Africa, Australia, America, Pakistan, Turkey and India due its great economical, commercial and industrial importance (Liu et al, 2005;Hari, 2007). Seeds of cotton are also used to feed cattle and poultry animals as cottonseed meal.…”