Screening of Soybean Germplasm for Better Storability
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Authors
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ASHOK KUMAR
Division of Seed Science and Technology, Indian Agricultural Research Institute, New Delhi 110 012
Author
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K. KANT
Division of Seed Science and Technology, Indian Agricultural Research Institute, New Delhi 110 012
Author
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M. DADLANI
Division of Seed Science and Technology, Indian Agricultural Research Institute, New Delhi 110 012
Author
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S.K. LAL
Division of Seed Science and Technology, Indian Agricultural Research Institute, New Delhi 110 012
Author
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VINOD KUMAR
Division of Seed Science and Technology, Indian Agricultural Research Institute, New Delhi 110 012
Author
Keywords:
Soybean germplasm, screening, storabilityAbstract
A total of 693 germplasm lines of soybean stored in bitumen paper bags for two years at IARI, New Delhi under ambient conditions were screened for storability. 104 genotypes showed more than 90 per cent germination even after two years of storage. In general, black seeded genotypes had higher germination (mean 77%) compared to yellow seeded (mean 35.9%) genotypes. Based on germination percentage 20 each better storer (more than 90% germination), medium storer (60-70% germination) and poor storer (30-40% germination) genotypes were selected and grown during kharif 2004. Observations were recorded on plant height, flower colour, days to flower and pod pubescence. The increased storability could be attributed to manually threshing method and bitumen paper waterproof seed envelopes. The study on morphological characters revealed that better storer had tawny pubescence (100%) and purple flower (95%); the poor storer genotypes had white flower (30%) and grey pubescence (20%). Storability had significant and positive correlation with days to flower (r = 0.26) and plant height (r = 0.71) and significant and negative correlation with 100 seed weight (r = -0.39). Fresh seeds of good storer, medium storer and poor storer genotypes were stored under ambient conditions for two years in cloth bags. Good storer still showed higher germination (mean 87.2%), compared to medium storer (mean 71.8%) and poor storer (mean 46.9%). Based on four years study sixteen good storer genotypes (> 90% germination even after two years of storage) were selected, of these four had yellow and twelve black testa and these can be used in the breeding programme.
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References
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