Effects of seed maturity and size on storage potential and subsequent field performance in groundnut (Arachis hypogaea L.)
1995
Pitchaya Rujirawat
Indeterminate growth habit of groundnut causes groundnut seeds to be non-uniform in maturity and size. This, in turn, affects seed quality and the quality of groundnut products. This study was undertaken to determine the effect of seed maturity and size on seed quality storability and subsequent field performance of Kaset 1 large-seeded groundnut. Groundnut pods were separated into three maturity groups, namely, mature, intermediate and immature. Seeds of each maturity group were also separated into three size categories, namely, large, medium and small. The seeds were then stored under controlled (20 deg C 50 percent RH.) and ambient conditions. Various tests were conducted prior to placing the seeds in storage and 2, 4 and 6 months thereafter. Field experiments were also conducted after 0, 2 and 6 months of storage. Results showed that prior to storage there were no differences in quality among the seed groups. However, after 6 month storage, the mature and the intermediate small groups showed lower level of storability than the others. Field experiment showed that prior to storage the immature small group was faster in field emergence but lower in growth than the others at early stages. After 6 month storage, however, the mature and the intermediate small groups had the lowest germination, pod and seed yield.
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