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GENETIC ANALYSIS OF GLYCINE MAX (L) MERRILL
IN SELECTED SOWING TIME
A. HAMEED ANSARI, A.D. JARWAR AND B.I. MAJEEDANO
Abstract: Glycine max
(L) Merrill genotypes (Bossier, Hampton, Improved Pelican and Clark-63) were planted
at 15 days interval (1st June, 15th June, 1st July, 15th July, 1st August and
15th August) at Agricultural Research Institute, Tando Jam during summer, 1993.
Seed yield and yield components varied significantly (P<0.0I) due to change
in sowing time and genotype. All genotypes yielded more when planted on 1st June,
while decreased for each delay in planting beyond 1st June. Among genotypes Bossier
yielded more over rest of the genotypes tested.
Genetic analysis depicted that
plant height and seed yield/plant had greater genetic advance, whereas heritability
was more in plant height, seed yield/plant, branches/plant, seed index, effective
pod filling period and pods/plant. Correlation of yield was significant and positive
with plant height, branches/plant, nodes/plant, pods/plant, seeds/pod, and seed
index. Flowering days exhibited significant and positive association with effective
pod filling period. Plant height had positive and significant relationship with
nodes/plaut and pods/plant. The correlation of branches/plant was positive and
significant with nodes/plant, seeds/pod and seed index. Nodes/plant displayed
positjve and significant correlation with pods/plant, while pods/plant depicted
positive and significam association with seeds /pod and seed index whereas seeds/pod
had positive and significam association with seed index.
The path coefficient
analysis reveals that pods/plant, plant height and seed index had high positive
direct effect on yield, while maturity days displayed high negative direct effect
on yield. The multiple regression analysis suggested that pods/plant and seed
index contributed significantly towards yield and could be used for future plant
breeding programme of soybean.
Agricultural
Research Institute, Tandojam- 70060, Sindh, Pakistan.
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