Molecular markers interlocked with fiber quality trait genes of chromosome 6 of upland cotton

Abstract

The invention discloses molecular markers interlocked with fiber quality trait genes of chromosome 6 of upland cotton. Markers interlocked with qFL, qFS and qFM are PGML3033, NBRI0277, SWU1781, SWU2422, SWU2282, SWU2454, SWU2436, T1, SWU1799, SRAP37F27R, SWU2138, MUSB0103, MUSS122, CGR5355, NAU1218, SWU1794, SWU2098, NAU0874 and SWU06-077. According to the molecular marker disclosed by the invention, the markers interlocked with the fiber quality genes are used for assistant selection, so that the efficiency of quality breeding of upland cotton fibers can be greatly improved.

Description

technical field [0001] The invention relates to a molecular marker linked with the fiber quality trait gene of the sixth chromosome of upland cotton, and belongs to the field of biotechnology application. Background technique [0002] Cotton is the world's premier natural fiber crop, and cotton fiber is an important raw material for the textile industry. The genus Gossypium includes 45 diploid and 5 tetraploid species (Percival et al. 1999), of which 4 are cultivars. There are two diploid species (Gossypium praecox and G. Asiatica) and two tetraploid species (G. upland and Gossypium sea-island) in cultivars, of which G. upland produces more than 95% of the world's raw cotton (Chen et al. 2007). my country's annual output of lint cotton is about 6 million tons, while the annual raw cotton demand of the textile industry is about 6.5 million tons. The fiber quality of my country's existing cotton varieties can basically meet the requirements of the current textile industry, b...

AI Technical Summary

Problems solved by technology

Among the mapped genes / QTLs, except for the cotton cytoplasmic sterility restorer gene mapped by Yin et al. (2006), the QTLs for other traits such as yield and fiber quality are far away from their linked markers, which cannot meet the needs of molecular marker-assisted selection and map location. clone request

The main reasons for this result: First, there is no QTL fine-mapping population established in the interspecific hybrid population of upland cotton and sea island cotton, and the existing population includes fewer individuals (single plants / lines), which can only meet the construction of the frame map Second, the polymorphism of molecular markers among upland cotton varieties is low, and there are not enough molecular markers to increase the density of map markers. Even if a QTL fine-mapping population is established, it is difficult to achieve the purpose of fine-mapping

Images