Rice improvement through radiation-induced mutation for cultivation is south vetnam

摘要

For past years, rice varieties cultivated in South Vietnam originated from domestic hybridisation or from IIRI. Rice multation breeding has been initiated for recent years. To meet the requirement of rice production diversification in different agro-ecological areas and rice genetic resources, from 1993 Institute of Agricultural Science of South Vietnam has carried out rice improvement by induced mutation of radiation. The mutagen was gamma rays lf ~(60)Co. The goal is to create inherited variations, which cannot be obtained from other breeding methods, specially important characters of rice varieties (high tolerance to acid sulfate soil, lodging resistance combined with early maturity), which were difficult to gain by hygridisation.