This report describes standardized data for “Genetic Variances and Heritabilities of Early Yellow Maize Population Following Cycles of Improvement for Striga Resistance and Drought Tolerance”. These data were standardized on 2023-10-11 by Cedric Ngakou with this R script. The original data have a CC-BY license. Here you can download the standardized data.

This is the full citation of the data set:

Badu-Apraku, Baffour; Robert Asiedu; O.A. Talabi; B. E. Ifie; E. Obeng-Bio (2018). Genetic Variances and Heritabilities of Early Yellow Maize Population Following Cycles of Improvement for Striga Resistance and Drought Tolerance. International Institute of Tropical Agriculture (IITA). Not versioned. doi:10.25502/20181101/1128/BB

The dataset has 2400 records and 28 variables for maize in Nigeria. The dataset has 1 treatment(s): variety.


These are the first 25 records:

records
trial_id planting_date on_farm is_survey treatment rep crop variety variety_code yield_part yield irrigated silking_days asi plant_height ear_height country location longitude latitude striga_trial borer_trial striga_infected p_asp e_asp husk
1-Ikenne 2010 TRUE FALSE Drought Stress 1 maize TZE-Y Pop DT C0 STR S1- 1 1 grain 730.6 FALSE 55 4 159 90 Nigeria Ikenne 3.698 6.901 TRUE FALSE FALSE 3.5 3.0 3.0
2-Ikenne 2010 TRUE FALSE Drought Stress 1 maize TZE-Y Pop DT C0 STR S1- 2 2 grain 1432.6 FALSE 55 2 184 112 Nigeria Ikenne 3.698 6.901 TRUE FALSE FALSE 3.0 3.0 2.5
3-Ikenne 2010 TRUE FALSE Drought Stress 1 maize TZE-Y Pop DT C0 STR S1- 3 3 grain 1533.7 FALSE 57 4 157 93 Nigeria Ikenne 3.698 6.901 TRUE FALSE FALSE 2.5 3.0 2.5
4-Ikenne 2010 TRUE FALSE Drought Stress 1 maize TZE-Y Pop DT C0 STR S1- 4 4 grain 603.5 FALSE 55 3 164 92 Nigeria Ikenne 3.698 6.901 TRUE FALSE FALSE 3.0 3.5 2.0
5-Ikenne 2010 TRUE FALSE Drought Stress 1 maize TZE-Y Pop DT C0 STR S1- 5 5 grain 287.8 FALSE 62 9 149 72 Nigeria Ikenne 3.698 6.901 TRUE FALSE FALSE 3.5 4.0 3.5
6-Ikenne 2010 TRUE FALSE Drought Stress 1 maize TZE-Y Pop DT C0 STR S1- 6 6 grain 638.8 FALSE 62 10 161 99 Nigeria Ikenne 3.698 6.901 TRUE FALSE FALSE 3.5 3.5 3.0
7-Ikenne 2010 TRUE FALSE Drought Stress 1 maize TZE-Y Pop DT C0 STR S1- 7 7 grain 667.0 FALSE 53 2 174 98 Nigeria Ikenne 3.698 6.901 TRUE FALSE FALSE 3.0 3.5 2.5
8-Ikenne 2010 TRUE FALSE Drought Stress 1 maize TZE-Y Pop DT C0 STR S1- 8 8 grain 559.6 FALSE 62 8 171 104 Nigeria Ikenne 3.698 6.901 TRUE FALSE FALSE 3.5 4.0 2.5
9-Ikenne 2010 TRUE FALSE Drought Stress 1 maize TZE-Y Pop DT C0 STR S1- 9 9 grain 284.0 FALSE 62 8 142 77 Nigeria Ikenne 3.698 6.901 TRUE FALSE FALSE 3.5 4.0 3.5
10-Ikenne 2010 TRUE FALSE Drought Stress 1 maize TZE-Y Pop DT C0 STR S1- 10 10 grain 157.8 FALSE 66 6 113 85 Nigeria Ikenne 3.698 6.901 TRUE FALSE FALSE 4.0 4.5 3.5
11-Ikenne 2010 TRUE FALSE Drought Stress 1 maize TZE-Y Pop DT C0 STR S1- 11 11 grain 814.7 FALSE 62 8 154 93 Nigeria Ikenne 3.698 6.901 TRUE FALSE FALSE 3.5 3.5 2.0
12-Ikenne 2010 TRUE FALSE Drought Stress 1 maize TZE-Y Pop DT C0 STR S1- 12 12 grain 478.6 FALSE 58 7 180 114 Nigeria Ikenne 3.698 6.901 TRUE FALSE FALSE 3.0 4.0 3.0
13-Ikenne 2010 TRUE FALSE Drought Stress 1 maize TZE-Y Pop DT C0 STR S1- 13 13 grain 1087.3 FALSE 59 6 156 85 Nigeria Ikenne 3.698 6.901 TRUE FALSE FALSE 3.0 3.5 2.5
14-Ikenne 2010 TRUE FALSE Drought Stress 1 maize TZE-Y Pop DT C0 STR S1- 14 14 grain 478.6 FALSE 62 8 141 74 Nigeria Ikenne 3.698 6.901 TRUE FALSE FALSE 3.5 3.5 3.0
15-Ikenne 2010 TRUE FALSE Drought Stress 1 maize TZE-Y Pop DT C0 STR S1- 15 15 grain 2281.9 FALSE 58 3 178 113 Nigeria Ikenne 3.698 6.901 TRUE FALSE FALSE 2.5 2.0 2.0
16-Ikenne 2010 TRUE FALSE Drought Stress 1 maize TZE-Y Pop DT C0 STR S1- 16 16 grain 820.3 FALSE 59 3 163 97 Nigeria Ikenne 3.698 6.901 TRUE FALSE FALSE 3.0 3.0 2.5
17-Ikenne 2010 TRUE FALSE Drought Stress 1 maize TZE-Y Pop DT C0 STR S1- 17 17 grain 1021.0 FALSE 55 4 159 96 Nigeria Ikenne 3.698 6.901 TRUE FALSE FALSE 3.0 3.5 2.5
18-Ikenne 2010 TRUE FALSE Drought Stress 1 maize TZE-Y Pop DT C0 STR S1- 18 18 grain 560.2 FALSE 60 6 157 94 Nigeria Ikenne 3.698 6.901 TRUE FALSE FALSE 3.0 4.0 2.5
19-Ikenne 2010 TRUE FALSE Drought Stress 1 maize TZE-Y Pop DT C0 STR S1- 19 19 grain 1037.6 FALSE 55 2 153 91 Nigeria Ikenne 3.698 6.901 TRUE FALSE FALSE 3.5 3.5 2.5
20-Ikenne 2010 TRUE FALSE Drought Stress 1 maize TZE-Y Pop DT C0 STR S1- 20 20 grain 611.0 FALSE 57 3 154 86 Nigeria Ikenne 3.698 6.901 TRUE FALSE FALSE 3.5 3.5 3.0
21-Ikenne 2010 TRUE FALSE Drought Stress 1 maize TZE-Y Pop DT C0 STR S1- 21 21 grain 1031.7 FALSE 56 5 145 82 Nigeria Ikenne 3.698 6.901 TRUE FALSE FALSE 3.0 3.0 2.5
22-Ikenne 2010 TRUE FALSE Drought Stress 1 maize TZE-Y Pop DT C0 STR S1- 22 22 grain 981.4 FALSE 54 3 194 120 Nigeria Ikenne 3.698 6.901 TRUE FALSE FALSE 3.0 3.0 2.5
23-Ikenne 2010 TRUE FALSE Drought Stress 1 maize TZE-Y Pop DT C0 STR S1- 23 23 grain 284.0 FALSE 62 7 148 84 Nigeria Ikenne 3.698 6.901 TRUE FALSE FALSE 3.5 3.5 3.0
24-Ikenne 2010 TRUE FALSE Drought Stress 1 maize TZE-Y Pop DT C0 STR S1- 24 24 grain 1430.0 FALSE 59 5 168 94 Nigeria Ikenne 3.698 6.901 TRUE FALSE FALSE 3.0 3.5 3.0
25-Ikenne 2010 TRUE FALSE Drought Stress 1 maize TZE-Y Pop DT C0 STR S1- 25 25 grain 725.7 FALSE 55 2 184 105 Nigeria Ikenne 3.698 6.901 TRUE FALSE FALSE 3.0 3.5 2.5


The observations were made at 2 locations. We have coordinates for 2 of these locations.


The standardization script emits the following non-compliance warnings.

type message
missing variables N_fertilizer, P_fertilizer, K_fertilizer, geo_from_source

The overall quality of the dataset, given the completeness of required variables was 6.2 on a scale of 10. See the table below

variable completeness (%)
planting_date 100
harvest_date 0
crop 100
variety 100
N_fertilizer 0
P_fertilizer 0
K_fertilizer 0
irrigated 100
latitude 100
longitude 100
location 100
adm 0
yield 100


The data are further summarized in the table below.

Variable Stats / Values Freqs (% of Valid) Graph Missing
trial_id [character]
1. 1-Ikenne
2. 10-Ikenne
3. 100-Ikenne
4. 101-Ikenne
5. 102-Ikenne
6. 103-Ikenne
7. 104-Ikenne
8. 105-Ikenne
9. 106-Ikenne
10. 107-Ikenne
[ 1910 others ]
2(0.1%)
2(0.1%)
2(0.1%)
2(0.1%)
2(0.1%)
2(0.1%)
2(0.1%)
2(0.1%)
2(0.1%)
2(0.1%)
2380(99.2%)
 0 (0.0%)
planting_date [integer]
Mean (sd) : 2011 (0.6)
min ≤ med ≤ max:
2010 ≤ 2011 ≤ 2012
IQR (CV) : 0 (0)
2010:480(20.0%)
2011:1440(60.0%)
2012:480(20.0%)
 0 (0.0%)
on_farm [logical] 1. TRUE
2400(100.0%)
 0 (0.0%)
is_survey [logical] 1. FALSE
2400(100.0%)
 0 (0.0%)
treatment [character]
1. Drought Stress
2. Well Water
960(40.0%)
1440(60.0%)
 0 (0.0%)
rep [integer]
Min : 1
Mean : 1.5
Max : 2
1:1200(50.0%)
2:1200(50.0%)
 0 (0.0%)
crop [character] 1. maize
2400(100.0%)
 0 (0.0%)
variety [character]
1. TZE-Y Pop DT C0 STR
2. TZE-Y Pop DT C0 STR
3. TZE-Y Pop DT C0 STR
4. TZE-Y Pop DT C0 STR
5. TZE-Y Pop DT C0 STR
6. TZE-Y Pop DT C0 STR
7. TZE-Y Pop DT C0 STR
8. TZE-Y Pop DT C0 STR
9. TZE-Y Pop DT C0 STR
10. TZE-Y Pop DT C0 STR
[ 230 others ]
10(0.4%)
10(0.4%)
10(0.4%)
10(0.4%)
10(0.4%)
10(0.4%)
10(0.4%)
10(0.4%)
10(0.4%)
10(0.4%)
2300(95.8%)
 0 (0.0%)
variety_code [integer]
Mean (sd) : 120.5 (69.3)
min ≤ med ≤ max:
1 ≤ 120.5 ≤ 240
IQR (CV) : 119.5 (0.6)
 240 distinct values 0 (0.0%)
yield_part [character] 1. grain
2400(100.0%)
 0 (0.0%)
yield [numeric]
Mean (sd) : 1943.2 (1461.7)
min ≤ med ≤ max:
31.8 ≤ 1511.1 ≤ 8262.7
IQR (CV) : 1866.3 (0.8)
 1608 distinct values 0 (0.0%)
irrigated [logical] 1. FALSE
2400(100.0%)
 0 (0.0%)
silking_days [integer]
Mean (sd) : 58.1 (4.1)
min ≤ med ≤ max:
50 ≤ 58 ≤ 71
IQR (CV) : 6 (0.1)
 22 distinct values 0 (0.0%)
asi [integer]
Mean (sd) : 2.6 (2.5)
min ≤ med ≤ max:
0 ≤ 2 ≤ 13
IQR (CV) : 3 (1)
 14 distinct values 0 (0.0%)
plant_height [numeric]
Mean (sd) : 164.7 (29.3)
min ≤ med ≤ max:
60.3 ≤ 162 ≤ 260
IQR (CV) : 37.8 (0.2)
 454 distinct values 0 (0.0%)
ear_height [numeric]
Mean (sd) : 83.5 (20.4)
min ≤ med ≤ max:
35 ≤ 82 ≤ 146.8
IQR (CV) : 28 (0.2)
 285 distinct values 0 (0.0%)
country [character] 1. Nigeria
2400(100.0%)
 0 (0.0%)
location [character]
1. Ikenne
2. kadawa
1920(80.0%)
480(20.0%)
 0 (0.0%)
striga_trial [logical] 1. TRUE
2400(100.0%)
 0 (0.0%)
borer_trial [logical] 1. FALSE
2400(100.0%)
 0 (0.0%)
striga_infected [logical] 1. FALSE
2400(100.0%)
 0 (0.0%)
p_asp [numeric]
Mean (sd) : 3.1 (0.7)
min ≤ med ≤ max:
1 ≤ 3 ≤ 5
IQR (CV) : 1 (0.2)
1.00:38(1.6%)
1.50:60(2.5%)
2.00:230(9.6%)
2.50:319(13.3%)
3.00:646(26.9%)
3.40:1(0.0%)
3.50:701(29.2%)
4.00:310(12.9%)
4.50:72(3.0%)
5.00:23(1.0%)
 0 (0.0%)
e_asp [numeric]
Mean (sd) : 3.1 (0.6)
min ≤ med ≤ max:
1 ≤ 3 ≤ 5
IQR (CV) : 0.5 (0.2)
1.00:10(0.4%)
1.50:35(1.5%)
2.00:137(5.7%)
2.50:343(14.3%)
2.60:1(0.0%)
3.00:741(30.9%)
3.50:914(38.1%)
4.00:188(7.8%)
4.50:24(1.0%)
5.00:7(0.3%)
 0 (0.0%)
husk [numeric]
Mean (sd) : 2.5 (0.6)
min ≤ med ≤ max:
1 ≤ 2.5 ≤ 4.5
IQR (CV) : 1 (0.2)
1.00:45(1.9%)
1.50:123(5.1%)
2.00:542(22.6%)
2.50:861(35.9%)
3.00:582(24.2%)
3.50:206(8.6%)
4.00:35(1.5%)
4.50:6(0.2%)
 0 (0.0%)