บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Hard seed studies in rice bean (Vigna umbellata).

Tomer, R. P. S.; Singh, K.;

Seed Science and Technology Year: 1993 Vol: 21 Issue: 3 Pages: 679-683 Ref: 11 ref.

1993

บทคัดย่อ

Hard seed studies in rice bean (Vigna umbellata).

High percentage of hard seededness was observed among the 43 lines screened: 17 genotypes had more than 70% hard seeds, 17 other genotypes had 50-70% hard seeds and the remaining 9 genotypes had 30-50% hard seeds. Scarification with sand paper for 2 min and chemical scarification with concentrated sulphuric acid and nitric acid were judged as the most effective methods for breaking seed dormancy due to hard seededness. Hot water treatment and prechilling were not effective. A low and non-significant correlation coefficient (r = 0.46) was observed for hard seeds percentage and 100-seed weight in 10 genotypes compared and no relation was established for seed coat colour and hard seeds percentage. A high and significant correlation was observed (r = 0.95) for percentage of seed achieving imbibition and germination, indicating that the factors blocking germination were those blocking imbibition. Genotypes RB56 and RB49 exhibited a steep increase in germination percentage and simultaneous decrease in hard seed percentage after the first month of storage. Thereafter, the percentages of germination and hard seed stabilized and remained constant till the end of a 7-months storage period. A total of 24 genotypes showed more than 60% germination at the end of the storage period as compared to none at the that period (i.e. immediately after harvesting).