HomeInternational Rice Research Notesvol. 30 no. 1 (2005)

Development of preharvest sprouting tolerance screening technique in rice

A.a. Mahbub | M. Sazzadur Rahman | M. Khanam | A R. Gomosta

Discipline: Biology, Agriculture



Germination of seeds while on the parent plant before harvest is referred to as preharvest sprouting. Preharvest sprouting of seeds in the panicle is a common problem where rain and flash flood frequently occur and plants lodge because of gusty winds and when temperature remains favorable for germination. The occurrence of preharvest sprouting is erratic and unpredictable. It is a phenomenon, which depends on genetic, physiological, and environmental factors, and is therefore complex and changeable from year to year. Preharvest sprouting in the panicle is undesirable as it reduces both seed quality and quantity. Yield loss occurs because of shattering and threshing when depleted kernels are winnowed out. Specific gravity and packing ratio are reduced in the affected grain and, consequently, it has a significantly reduced test weight (Derera 1989).