Abstract
BackgroundCotton is an important fiber crop worldwide. The yield potential of current genotypes of cotton can be exploited through hybridization. However, to develop superior hybrids with high yield and fiber quality traits, information of genetic control of traits is prerequisite. Therefore, genetic analysis plays pivotal role in plant breeding.ResultsIn present study, North Carolina II mating design was used to cross 5 female parents with 6 male parents to produce 30 intraspecific F1 cotton hybrids. All plant materials were tested in three different ecological regions of China during the year of 2016–2017. Additive-dominance-environment (ADE) genetic model was used to estimate the genetic effects and genotypic and phenotypic correlation of yield and fiber quality traits. Results showed that yield traits except lint percentage were mainly controlled by genetic and environment interaction effects, whereas lint percentage and fiber quality traits were determined by main genetic effects. Moreover, dominant and additive-environment interaction effects had more influence on yield traits, whereas additive and dominance-environment interaction effects were found to be predominant for fiber traits. Broad-sense and its interaction heritability were significant for all yield and most of fiber quality traits. Narrow-sense and its interaction heritability were non-significant for boll number and seed cotton yield. Correlation analysis indicated that seed cotton yield had significant positive correlation with other yield attributes and non-significant with fiber quality traits. All fiber quality traits had significant positive correlation with each other except micronaire.ConclusionsResults of current study provide important information about genetic control of yield and fiber quality traits. Further, this study identified that parental lines, e.g., SJ48–1, ZB-1, 851–2, and DT-8 can be utilized to improve yield and fiber quality traits in cotton.
Highlights
Cotton is an important fiber crop worldwide
The VD of boll weight (BW), Seed cotton yield (SCY) and Lint yield (LY) were greater than the VA, while the opposite was true for Lint percentage (LP) and all fiber quality traits
Results of genetic-environment interaction showed that the variance of additive-environment (VAE) interaction was larger than the variance of dominant-environment (VDE) interaction
Summary
Cotton is an important fiber crop worldwide. The yield potential of current genotypes of cotton can be exploited through hybridization. Cotton is the primary natural fiber crop used in textile industry, source of edible oil, and planted in more than 80 countries/regions of the world (Li et al 2019). Physiologically effective and having good combining abilities are generally useful to explore heterosis in commercial hybrids. Estimation of combining ability or genetic effects is an important strategy to sort out superior and inferior parents coupled with better crosses (Basal and Turgut 2005; Khan et al 2015; Rauf et al 2005). GCA is associated with the parental lines and underlies additive gene contributions, whereas SCA is related to the comparative performance of hybrids and determines non-additive gene action, viz., dominant and epistatic
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
