[Overview] 13 scientific research institutions, including the Molecular Breeding Research Team of Institute of Cotton Research of CAAC, Northwest A&F University, Zhengzhou University, etc. have revealed the genetic relationship between the cotton yield and the quality trait of fiber through genetic site research. The quantitative trait of the whole genome. Quality and yield of cotton fibers are further improved by using marker assisted selection, genome editing and other technologies. And important genetic resources and locus information can be provided. Relevant research achievements have been published on Plant Biotechnology Journal.

13 scientific research institutions, including the Molecular Breeding Research Team of Institute of Cotton Research of CAAC, Northwest A&F University, Zhengzhou University, etc. have revealed the genetic relationship between the cotton yield and the quality trait of fiber through genetic site research. The quantitative trait of the whole genome. Quality and yield of cotton fibers are further improved by using marker assisted selection, genome editing and other technologies. And important genetic resources and locus information can be provided. Relevant research achievements have been published on Plant Biotechnology Journal.

Shang Haihong, researcher of Institute of Cotton Research of CAAC, says that cotton is the most widely planted fiber crop in the world. The requirements of the modern textile industry for fiber quality are higher and higher. However, there is a negative correlation between ginning outturn (the main constituent factor of the yield trait of the cotton fiber) and the quality trait of cotton fiber, which is a problem that has troubled cotton breeders for a long term. Conventional breeding methods are hard to improve the quality and yield of cotton fibers at the same time.

By using the hybridization technique of seed parent 0-153 and SGK9708, this research evaluated cotton yield and fiber quality of 22 environments in the Yellow River Basin and cotton planting regions in Northwestern China, getting the fiber length, strength, Micronaire value and the whole genome sequencing. There are 983 genetic sites relating to quality and yield, such as the boll weight, ginning outturn and seed index. Wherein, 198 genetic loci have been determined in stability detection in many environments, and 155 genetic sites have been revealed in the first report. These quantitative trait genes loca constitute 37 clusters and 59 pairs of clusters. Among the five pairs of traits with high and medium positive correlations, 92.8％ traits have the same additive effect direction. And among the five pairs of traits with high and medium negative correlations, the additive effect of all the quantitative traits is opposite. There is a negative correlation between the yield of genetic site clusters and the additive effect of six quantitative trait loca. The genetic effect of the quantitative trait locus qClu-chr13-2 obtained in the research is further verified in natural population. The quality and production are very important.