Production of New Cotton Interspecific Hybrids with Enhanced Fiber Fineness

Abstract

To improve cotton fiber fineness, the (Gossypium hirsutum L. × Gossypium longicalyx Hutch. & Lee)² allohexaploid and the [(Gossypium hirsutum L. × Gossypium thurberi Tod.)² × G. longicalyx] allotetraploid were backcrossed to G. hirsutum to produce introgressed genetic stocks. The ribbon width (RW) of 600 swelled fibers produced by the hybrids, their parents, and their backcross progeny were analyzed for each compared genotype using an optical microscope. The RWs varied between 6.41±2.15 µm for G. longicalyx to 17.45±2.98 µm for the G. hirsutum parent cultivar C2. Fibers produced by the trispecific hybrids and their progeny were finer than the bispecific hybrid material. For the introgressed stocks, the lowest RWs were observed for the trispecific hybrid (10.79±2.14 µm) and certain backcross progenies (between 11.98±1.27 µm to 12.71±1.61 µm). The allohexaploid RW was 13.58±1.41 µm. One of its tetraploid progeny produced approximately the same value (13.94±2.48 µm). These results show that G. longicalyx is a potential genetic stock for cotton fiber fineness improvement. The genetic stocks produced are valuable materials for improve the fineness of cotton fiber.

Phenotypic, Cytological and Molecular (AFLP) Analyses of the Cotton Synthetic Allohexaploid Hybrid (<i>G. hirsutum</i> × <i>G. longicalyx</i>)<sup>²</sup>

“…The results of the fiber fineness analysis are presented in G. longicalyx as reported by several authors [4] [12] [13], and its remarkable potential to improve the fiber fineness of G. hirsutum, with regard to the expression of this interesting trait in the hexaploid (G. hirsutum × G. longiclayx) 2 .…”

“…The African wild species G. longicalyx Hutchinson and Lee (F1 genome) represents an interesting source of genes that can potentially be transferred to the main cultivated cotton species. This wild diploid species could be used as donor of the desirable trait of fiber fineness, which is very important to textile industry [4] [12] [13], and also as donor of the resistance to reniform nematode [14] [15].…”

Competitive Evaluation of Perspective Cotton Lines in Variety Development Nursery

“…Результаты изучения индекса равномерности волокна показали, что среди изучаемых линий самым высоким показателем (85,4 ± 0,80 %) характеризуется линия TR-6, а самым низким (81,4 ± 0,67 %) -линия TR-1. Тогда как средние международные стандарты для этого признака равны 80-82 %, а высокие -83-85 % [15].…”

Relationship between meiotic behaviour and fertility in backcross-1 derivatives of the [(Gossypium hirsutum × G. thurberi)2 × G. longicalyx] trispecies hybrid

“…The diameter of at least 100 fibers was then measured with the software NIS-Elements BR 2.30 using the Nikon Eclipse E800 microscope (Nikon, Tokyo, Japan) equipped with a digital JVC KY-F 58E camera (JVC, Yokohama, Japan). The ribbon width was determined by dividing the mean of the diameters measured by the 1.3 Summers coefficient (Roehrich 1947;Nacoulima et al 2016). All the data collected were subjected to the analysis of variance (ANOVA) using the software Statistica 7.1 (Stat Soft France).…”

“…In cotton breeding, wild species are an important source of several desirable genes for genetic improvement of G. hirsutum such as fiber quality, resistance to diseases and insect pests, or tolerance to abiotic stress. The wild species G. longicalyx Hutchinson & Lee, 1958 (F 1 genome) could be used as donor of the desirable traits of fiber fineness, length and strength, which are very important to textile industry (Demol et al 1978, Ndungo et al 1988, Nacoulima et al 2016. G. longicalyx appears to be a mixed genome related to all the other cotton genomes (except D genome) and phylogenetic analysis suggests a close relationship between its F 1 genome and the A genome (Cronn et al 2002).…”