Effect of X-rays on Agronomic Characters in Rice (Mutations in Rice Induced by X-rays II)
Other Title
X線對水稻農藝性狀之影響-水稻經X線處理後所發生之突然變異之第二報
Journal
農業研究
Journal Volume
8
Journal Issue
2
Start Page
1
End Page
5
Date Issued
1959-06-01
Date
1959-06-01
Author(s)
Sung-Ching Hsieh
謝順景
Abstract
The present paper describes the effect of X-rays on the agronomic characters which are generally regarded as controlled by the so-called polygenes. The seedling growth was supressed differently by the different dosages of X-rays in X1 generation, while average of plant height, tiller and ear numbers, length and weight of ears were not much different from the control, though the range of variability was increased.
臺中65號稱萌芽種子已如第一報所示方法以5,000r，7,000r，8,000r及10,000r四種X線量處理後與對照同播於玻璃室內，35天後移栽於田間。本試驗對於插秧前之苗高及收穫前後之株高，分蘗數，穗數，穗長，穗重等量性狀加以調查，觀察不同X線量對處理第一代各農藝性狀之影響，所得初步結果如下：
不同X線量對於苗高有抑制之影響，其程度概因X線量強者為甚。佐伯式(1936)曾報告說，少量的X線可促進，大量則可抑制稻之生長。在目前試驗結果表示，除7,000r處理區有稍提高平均苗高外，其他處理區均有抑制之現象，但此現象至收穫，前漸不顯明。X線量對穗長或穗數，穗重等性狀，並無良好影響，因此由X線處理而欲獲得產量高的系統似乎較為困難。
一般而言，量性狀通常受所謂數量因子(Polygenes)所支配，其對變異的影響被認為較環境因子之影響為小。此等數量因子在育種上甚為重要，而如何受放射線之影響一事實需繼續深加研究。本試驗初步的結果表示，經處理後之各量性狀之變異較未處理者為大。
Publisher
農業試驗所
Type
journal article
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