Line × Tester Mating Design Analysis for Grain Yield and Yield Related Traits in Bread Wheat (Triticum aestivum L.)

Table 6

Estimates of genetic components for the measured characters in bread wheat.

	DHE	PHT	SL	FT	TKW	NG	GY
𝜎^2gca	1.93	27.65	0.07	1.68	4.10	14.69	1.49
𝜎^2sca	12.17	173.48	0.84	12.27	23.80	98.03	15.28
𝜎^2𝐴	3.87	55.30	0.15	3.36	8.20	29.38	2.97
𝜎^2𝐷	12.17	173.48	0.84	12.27	23.80	98.03	15.28
𝜎^2gca/𝜎^2sca	0.16	0.16	0.09	0.14	0.17	0.15	0.10
[𝜎^2𝐷/𝜎^2𝐴]^1/2	1.77	1.77	2.39	1.91	1.70	1.83	2.27
ℎ^2ns	56.30	60.30	10.30	33.30	54.40	50.40	16.90

𝜎²_𝐴: additive genetic variance, 𝜎²_𝐷: dominance genetic variance, ℎ²_ns: narrow sense heritability, 𝜎²_gca: estimate of GCA variance, 𝜎²_sca: estimate of SCA variance, and 𝜎²_gca/𝜎²_sca: average degree of dominance. DHE: number of days to heading, PHT: plant height (cm), SL: spike length (cm), FT: number of fertile tillers, TKW: thousand-kernel weight (g), NG: number of grains per spike, and GY: grain yield (g).