Combining ability studies in desi cotton (Gossypium arboreum L.) genotypes

Table 8 Genetic components of variance for four yield and yield attributing traits in G. arboreum

Components	BW	BN	SPY	DFF
t² values	24.288	5.178	2.683	0.910
D	–0.046	128.991	18.631	7.697
H₁	0.163	537.531	2 179.044	71.717
H₂	0.189	344.172	1 899.495	47.396
(H₁/D)^1/2	–1.891	2.041	10.815	3.053
F	–0.077	254.311	70.112	22.679
h₂	0.023	29.970	191.662	50.267
E	0.092	11.909	22.061	1.720
H₂/4H₁	0.290	0.160	0.218	0.165
V4dh₁ + F/V4DH₁-F	0.384	2.868	1.421	2.866
h₂/H₂	0.121	0.087	0.101	1.061
h²(ns)	0.018	0.258	0.187	0.256

BW boll weight, BN boll number, SPY single plant yield, DFF days to first flowering; D component of variation due to additive effect of gene, H₁ component of variation due to dominant effect of gene, H₂ proportion of dominance variance due to positive and negative effect of gene, h₂ dominance effect expressed as the algebraic sum over all loci in heterozygous phase in all crosses, F mean of covariance of additive and non-additive effect over arrays, (H₁/D)^1/2 average degree of dominance, H₂/4H₁ proportion of genes with positive and negative efect in the parents, V4dh₁ + F/V4DH₁-F proportion of dominance and recessive genes in the parents, h²(ns) heritability in narrow-sense

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