Stability and genetic diversity for yield and yield components in some Egyptian Cotton genotypes [electronic resource]

Includes bibliographic reference

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, ElDakahleia,
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) exhibited
average 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%.

Summary in Arabic