Efficiency of Single Trait Selection for Improving Yield and Earliness in Varietal Maintenance of Giza 90 Egyptian Cotton
emahdy, E., A., A., EL-Hebbeeny, Y., EL-Kad, Y. (2017). Efficiency of Single Trait Selection for Improving Yield and Earliness in Varietal Maintenance of Giza 90 Egyptian Cotton. EKB Journal Management System, 48(1-1), 28-44. doi: 10.21608/ajas.2017.3729
E. E. emahdy; A. Hamada A.; Y. I. EL-Hebbeeny; Y. M. EL-Kad. "Efficiency of Single Trait Selection for Improving Yield and Earliness in Varietal Maintenance of Giza 90 Egyptian Cotton". EKB Journal Management System, 48, 1-1, 2017, 28-44. doi: 10.21608/ajas.2017.3729
emahdy, E., A., A., EL-Hebbeeny, Y., EL-Kad, Y. (2017). 'Efficiency of Single Trait Selection for Improving Yield and Earliness in Varietal Maintenance of Giza 90 Egyptian Cotton', EKB Journal Management System, 48(1-1), pp. 28-44. doi: 10.21608/ajas.2017.3729
emahdy, E., A., A., EL-Hebbeeny, Y., EL-Kad, Y. Efficiency of Single Trait Selection for Improving Yield and Earliness in Varietal Maintenance of Giza 90 Egyptian Cotton. EKB Journal Management System, 2017; 48(1-1): 28-44. doi: 10.21608/ajas.2017.3729

Efficiency of Single Trait Selection for Improving Yield and Earliness in Varietal Maintenance of Giza 90 Egyptian Cotton

Assiut Journal of Agricultural Sciences
Article 3, Volume 48, 1-1, February 2017, Page 28-44  XML PDF (406.79 K)
Document Type: Original Article
DOI: 10.21608/ajas.2017.3729
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Authors
E. E. emahdy1; A. Hamada A.2; Y. I. EL-Hebbeeny3; Y. M. EL-Kad4
1Assiut Univ. Fac. Agric
2Agronomy Dept., Faculty of Agric., Assiut Uni., Egypt
3ARC, Cotton Res. Ins
4ARC, Cotton Res. Ins.
Abstract
The present study was carried out at Shandaweel Res. Sta. Sohag, Cotton Res. Inst., (ARC), during the three summer seasons of 2013 -2015. The basic materials were selfed seeds of 60 single plants selected from the breeding nursery of renewal and maintenance of Giza 90 (the same materials used for producing the nucleolus of G.90). The main objective of this work was to study the possibility of selection elite high yielding plants characterized by the same fiber properties of Giza 90. To attain this goal, single trait selection for lint yield, lint percentage and earliness was applied for two cycles. Average of the ten selected families indicated that selection for LY/P ranked the first and improved LY/P by 20.30% of the check strain followed by selection for days to first flower method (15.82%), and LY/P restricted by DFF (11.54%). Generally, single trait selection is an effective method to improve selection criterion. The observed genetic gain indicated that single trait selection resulted in several superior families significant out yielded the check strain and better in one or more of the three main fiber properties; fineness, strength and Upper Half Mean length. Therefore, the official method of maintaining and renewing Egyptian cotton varieties should be modified to allow selection for yield beside preserving fiber properties.
Keywords
Maintenance of Egyptian cotton; single trait selection; observed genetic gain; genotypic and phenotypic variation; heritability
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