The effect of iudividual selections to find the lines of disease recis-tance in F₂ generation of rice hybrids under the conditlons of late transplanting on fertilised field.

Abstract

The resistance to rice blast disease is one of the important characters treatedin the breeding of rice plants and the selection for the chara cter is usually made in F₃ or F₄ generation of hybrid. An attempt to practise an individual selections in the F generation for the resist ance of the disease was undertaken in this exp eriment. The resistant lines were obtained with more accuracy in the F₂ individual selections.but the selections of other economic characters were not so effective. So it is considered as the result tha.t the F₂ individual selection is a better method when the resistance to rice blast is the main purpose of breeding.