STABILITY AND GENETIC DIVERSITY FOR YIELD AND YIELD COMPONENTS IN SOME EGYPTIAN COTTON GENOTYPES | ||
| Egyptian Journal of Agricultural Research | ||
| Article 9, Volume 95, Issue 4, December 2017, Pages 1613-1629 PDF (736.31 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejar.2017.151553 | ||
| Author | ||
| SAMIA E. ALI | ||
| Cotton Research Institute, ARC, Giza, Egypt. | ||
| Abstract | ||
| the present investigation aimed to determine phenotypic and genotypic stability of some long staple cotton genotypes using stability statistical analysis. Also to identify the range of similarity and diversity between these genotypes. Twenty one genotypes besides three check varieties, (promising cross [(G.89 x Karshenky) x G.86] x G.94 and two check genotypes: G.94 and G.86, were evaluated under six locations i.e.,(Kafr El-Sheikh, El- Dakahleia, El-Monofeia, El-Sharkeia ,El-Gharbeia and El Behera) during 2016 season for yield and its components. The results showed that variances due to genotypes, environments and genotype x environment interaction were highly significant for all studied traits except genotypes for boll weight was significant, which indicated that these genotypes interacted differentially with environments. The heritability values were high for studied traits (over50%) indicating that the phenotypic selection for these strains could be highly effective. The results of phenotypic stability showed that the genotypes No.1 and No. 18 for boll weight, No.9 for seed cotton yield and No.7 for lint cotton yield had phenotypic stability. Average genotypic stability recorded by genotypes No.12,21 and 23the (chick varietyG.94) for all studied traits and surpassed chick varietyG.86 .Nine genotypes No.1,2,5,12,13,18,21,22 the(promising cross [(G.89 x Karsh.) x G.86] x G.94 and 23 exhibited average level of stability also genotypes No.7,8 and 14 observed above average of stability at probability level of 0.95 for boll weight, while twelve genotypes No. 3,7,9,10,12,14,15,19,20,21,23(G.94) and 24(G.86) exhibitedaverage level of stability for seed cotton yield and lint yield most of them surpassed the overall Mean and chick variety G.86.As for similarity , the results showed that the genotype No.12 and 22 revealed the lower distance 3.411 with similarity level 98.91%, while the genotype No.8 and node 22( all the genotypes) showed the highly distance 69.073 with similarity level 77.83%. The cotton breeder could choose the genotypes which have the highest stability, yield and fiber quality to be used as commercial varieties. According to the previous results the cross [(G.89 x Karsh.) x G.86] xG.94 could be good substitutes to G.94 variety. Also genotypesNo.14 F8632/2015 descending from the cross (G.89 xG.86) x[(G.83 x80)x G.89] ,No.18 F10661/2015 descending from the cross G.85 x(G.89x G.86) and No.1 descending from the cross G.94 x [(G.89 x Pima S6) x G.86] could be good substitutes to the variety G.86.Therefore the genotype No.8 F8609/2015 descending from the cross (G.89 x Pima S6) x {[(Bah.105 x G.67) x (G.72 x Del.)] X (G.89 xG.86)} with the high distance could be used as a parent in the breeding programs. | ||
| Keywords | ||
| Heritability; Gosssypium barbadense; L; Promising lines; cotton yield traits; Stability statistic analysis; G x E interaction; genetic distance | ||
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