水稻短稈變異系統의 量的形質에 關한 硏究

Studies on Quantitative Characters of Short Culm Mutants in Rice

水稻 두 奬勵品種의 種子 및 幼苗에 放射線을 照射하여 誘起, 選拔된 短稈變異系統의 量的形質에 對한 變異를 調査하였다. 一般的으로 着粒密度, 收量, 株當穗數 및 穗長 等의 形質의 變異幅은 넓다. 稈長과 出穗期, 穗長, 倒伏程度 및 收量과 出穗期와 着粒密度 및 穗長間의 相關에 있어서는 高度의 有意性이 있었으며, 그리고 短稈變異系統中에서 母品種에 比해 增收될 수 있는 몇有用한 系統을 選拔할 수가 있었다.

The variation of quantitative characters were studied on short culm mutants induced by means of gamma-ray from two leading varieties. Some results obtained are summarized as follows; In general the variation of grain density, grain yield, panicle number per plant and panicle length were found to vary relative to mother varieties. Clear correlationship was obtained between culm length and heading date, panicle length, lodging degree, grain yield, and between leading date and grain density or panicle length in short culm lines. Among the short culm mutants, some were desirable line with high yield characters.