TRIALLEL ANALYSIS OF SOME QUANTITATIVELY INHERITED TRAITS IN Gossypium barbadense L.: II-FIBER PROPERTIES | ||||
| Journal of Plant Production | ||||
| Article 11, Volume 28, Issue 10, October 2003, Page 7319-7329 PDF (3 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2003.245255 | ||||
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| Authors | ||||
| M. M. Abd EI-Maksoud,1; A. M. EI-Adl1; M. S. Hamada1; A. M. Abd EI-Bary2 | ||||
| 1Dept. of Genetics, Faculty of Agric., Mansoura Univ., EGYPT | ||||
| 2Cotton Research Institute, Agric. Res. Center, Giza, EGYPT | ||||
| Abstract | ||||
| This investigation aimed to evaluate some three-way crosses of Egyptian cotton for combining ability and further partition of genotypic variance to its components for fiber properties. The genetic materials used in the present study included six cotton varieties and their 60 three-way crosses. These genotypes were evaluated during two successive growing seasons at Sakha Agricultural Research Station, Kafr EI-Sheikh Governorate for the following traits: fiber fineness , fiber strength, 50% span length, 2.5% span length and uniformity ratio. The results revealed that partition of the three-way crosses mean squares to its components predicted Hie significant contribution of additive, dominance end epistatic variances in the genetic expression of fiber properties. These parameters were stable at different years for the studied fiber properties except for 2.5% span length. Giza 87 variety was the best general combiners as a parent andlor grand parent in the three-way crosses for yield and yield components. Therefore, this variety could be utilized in a breeding program for improving these traits to pass favorable genes for improving hybrid and subsequently producing improved genotypes through the selection in segregating generations. The best three-way combination for fiber properties resulted from the crossing the single cross (Giza 76 x Giza 87) by Giza 85 as parent. In addition, the results showed that fiber properties were mainly contrclled by additive variance as well as additive x dominance variances, while the other components play the minor role in the inheritance of these traits. Thus, the selection within the advanced generations of the previous three-way cross may be effective for improving fiber properties. | ||||
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