MUNGBEAN VARIETAL IMPROVEMENT S. Shanmugasundaram

Table 5.
-46-
Genetic variability in 29 characters of 68 promising mungbean
cultivars. a
Character Mean + SE Range
Yield (kg/ha)
Pods/plant
Seeds/pod
1,000 seed weight (gr)
Pod length (mm)
Pod thickness (mm)
No. of clusters
No. of clusters on main stem
No. of pods on main stem
Ave. no. of pods/cluster
Position of 1st pod (node)
Length of peduncle (cm)
Plant height (cm)
No. of nodes on main stem
Average length of internode (cm)
Protein (%)
Days to flowering (DAP)
Days to first pod maturity (DAP)
Mean maturity (DAP)
Photoperiod response b
Hairiness (1-5)
Stem diameter (mm)
Total no. of branches
Longest branch length (cm)
No. of branches with pods
Width of middle leaflet (cm)
Length of middle leaflet (cm)
Leaf shape (27/26)
Petiole length (cm)
866 ± 19
26+0.8
11+0.1
46 + 1.2
88+1
5+0.1
8+0.2
5 :LOA
20 ± 0.5
3 ± 0.04
7+ 0.06
16+0.2
52 ± 0.9
12+ 0.1
4+0.1
21.8 +
41 + 0.3
63 + 0.4
89 ± 0.2
19 + 0.9
0.0419 + 0.9
0.119 ± 0.9
0.0519 ± 0.9
0.819 + 0.9
0.0619 + 0.9
0.1319 ± 0.9
0.1119 + 0.9
0.0119 + 0.9
0.219 ± 0.9
339 - 1,222
11 -47
9 - 14
23 - 89
65 - 139
4-7
4 - 16
3-9
11 - 37
2-5
5-9
9-21
23 - 74
9-15
2.5 - 5.8
19-25
34 - 52
55 - 76
86 - 96
3 - 43
0.8 - 3.1
3.6 - 9.3
1.8 - 4.6
4.4 - 45.7
0.2 - 2.9
6.4 - 13.3
8.1 - 13.5
0.98 - 1.27
9.6 - 21.7
a Planted at AVRDC on Sept. 8, 1977, 4 rows 6 m in length, 50 cm apart, with 3
replications (H.G. Park, AVRDC, unpublished).
b Difference in days to flowering between September and December plantings (12
hr and 16 hr photoperiods).
Crossing Methods
The mungbean plant flowers in phases with axillary or terminal racemes
containing a cluster of 10 to 20 cleistogamous flowers. Pollination occurs from 9
to 10 pm until midnight (Bose, 1939). Flower shedding is common, averaging
about 60%. Outcrossing averages around 2 to 5% (van Rheenen, 1964; Bhadra and
Shill, 1986), but varies with the cultivar and the season. A crossing technique was
outlined by Boling et al. (1961). For emasculation, the standard and wing petals