Selection parameters for improving the seed cotton yield and fibre quality traits in American cotton (Gossypium hirsutum L.)

Hence this present study was planned to assess the genetic variability, correlation and path analysis for various yield and fibre quality characters in a set of genotypes.
Nội dung trích xuất từ tài liệu:
Selection parameters for improving the seed cotton yield and fibre quality traits in American cotton (Gossypium hirsutum L.) Int.J.Curr.Microbiol.App.Sci (2020) 9(10): 1333-1342 International Journal of Current Microbiology and Applied Sciences ISSN: 2319-7706 Volume 9 Number 10 (2020) Journal homepage: http://www.ijcmas.com Original Research Article https://doi.org/10.20546/ijcmas.2020.910.160 Selection Parameters for Improving the Seed Cotton Yield and Fibre Quality Traits in American Cotton (Gossypium hirsutum L.) M. Gnanasekaran* and K. Thiyagu Tamil Nadu Agricultural University, Cotton Research Station, Srivilliputtur-626 135, India *Corresponding author ABSTRACT Information on the effect of different yield components on improvement of yield will be crucial in any selection programme. Thirty four genotypes of American cotton (Gossypium hirsutum L.) were utilized to study the genetic variability and correlation of yield, its components and fibre properties and data recorded were analyzed to understand the relative contribution of different yield components in enhancing the yield and fibre quality.Keywords Study revealed high heritability observed for days to first flowering, days to fifty percent flowering, number of monopodia per plant, number of bolls per plant, ginning percentage,Correlation, G. upper half mean length, bundle strength, fibre fineness, uniformity index and seed cottonhirsutum, yield. Number of monopodia per plant, number of bolls per plant and seed cotton yieldVariability, Yield shows high heritability coupled with high genetic advance over mean indicating thecomponents preponderance of additive gene action in the inheritance of these traits. Traits such as daysArticle Info to first flowering, days to fifty percent flowering, ginning percentage, ginning percentage, upper half mean length, bundle strength and uniformity index in which high heritabilityAccepted: accompanied by low genetic advance was recorded indicates the effect of non-additive12 September 2020 gene action. Significant positive association of plant height, number of bolls per plant, bollAvailable Online: weight and seed index was observed with seed cotton yield per plant. Association of traits10 October 2020 inter se revealed the positive and significant association of number of bolls per plant with seed index; Boll weight with seed index, lint index; seed index with fibre fineness was observed. Path coefficient analysis revealed that days to first flowering, plant height and lint index have positive and very high direct effect on seed cotton yield. Information generated on the relationship between yield components, fibre quality and seed cotton yield will help the crop breeder in enhancing the efficiency of selection.Introduction decades the export of textile products increased steadily, correspondingly textile‘White gold’ is the popular term assigned to industry has also grown in faster rate andindicate the importance of cotton crop. Cotton therefore high yielding superior quality cotton(Gossypium hirsutum L.) is a predominant varieties/hybrids have to be bred to promotecommercial fibre crop popular among the the export in order to enhance the foreignfarming community due to its higher yield exchange. Further, recent advances inand superior fibre quality. For the past few spinning technology demands better fibre 1333 Int.J.Curr.Microbiol.App.Sci (2020) 9(10): 1333-1342quality with improved fibre length and bundle correlation and path analysis for various yieldstrength to produce better quality yarn. and fibre quality characters in a set ofHence, the genotypes with high yield and genotypes.improved fibre properties are needed to bedeveloped to meet the ever-growing demands Materials and Methodsof textile industries. In any crop,improvement of yield will be the first and The present research work was carrie ...