Genetic Variability for the Yield and Yield-Related Traits in Some Maize (Zea mays L.) Inbred Lines in the Central Highland of Ethiopia

Table 6

Estimate of heritability (), genetic advance, and genetic advance percent of the mean for grain yield and other related traits among 25 inbred lines of maize at APPRC.

S/N	Traits		GA	GA (%)
1	Days to 50% tasseling	86.56	3.29	3.17
2	Days to 50% silking	91.57	3.27	3.09
3	Plant height	81.54	12.66	8.72
4	Ear height	76.09	11.03	16.38
5	Number of leaves per plant	83.10	0.87	6.02
6	Leaf length	84.46	4.86	7.16
7	Leaf width	66.27	0.68	7.07
8	Number of tassel branches	86.22	2.43	16.43
9	Ear length	73.28	1.64	14.18
10	Ear diameter	28.25	0.23	5.99
11	Number of kernel rows per ear	56.69	0.81	6.61
12	Number of kernels per row	65.45	3.74	16.31
13	Number of ears per plant	25.45	0.13	10.79
14	Thousand kernel weight	70.17	35.31	15.42
15	Grain yield per plant	43.96	14.30	18.95
16	Grain yield per hectare	64.66	59.66	28.05
17	Aboveground biomass yield per plant	31.93	83.71	12.72
18	Harvest index	57.11	4.07	16.33

Note.  = heritability, GA = genetic advance, GA% = genetic advance as a percent of the mean, and S/N = serial number. Plant height (8.72), leaf length (7.16), leaf width (7.07), number of kernel rows per ear (6.61), number of leaves per plant (6.02), ear diameter (5.99), days to 50% silking (3.09), and days to 50% tasseling (3.17) all showed low genetic advance as a percent of the mean.