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THE VARIATIONS AND GENETIC PATTERNS OF FOUR QUANTITATIVE CHARACTERS OF RICE UNDER DIFFERENT ENVIRONMENTAL CONDITIONS Taiwan Agricultural Research Institute
S.T. Yen; 嚴盛添.
[[abstract]]In order to obtain the information on the variations and genetic patterns of four quantitative characters of a rice cross in different environmental conditions, a cross of IG-65-1 × Pai-kan-kan-tao was used in this study. The data on plant height, panicle number, panicle length and panicle weight per plant showed that the responses of these four characters in parents and F2 populations were different under different environmental conditions. Monogenic or digenic mode of inheritance differentiating the four characters respectively, were found in most of the cases, indicating that the environment did not affect the genetic patterns but shift the dividing points. It was found that the heritability value was highest at S1N2 for all three characters...
Palavras-chave: [[classification]]6.
Ano: 1969
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一突變矮稻之顏色性狀及其他性狀之遺傳稻之遺傳因子分析第十報 Taiwan Agricultural Research Institute
嚴盛添; 謝順景; S.T.Yen; S.C.Hsieh.
[[abstract]]D-155-8是臺中155號放射線誘變而得之突變矮稻,稃尖無色、葉細、深綠色、有葉舌、矮(高約 70cm)。謝(1962)將此矮性因子訂為d9,Chang和Jodon(1963)統一改定為d31。在D-155-8×T201等7組合之分析中,得知此D-155-8親本稃尖和柱頭顏色之因子為CBPa P Ps1 Ps2 I-Ps1。同時得知,柱頭著色為稃尖著色因子之下位,此點和Nagao及Takahashi等之報告相同。同時柱頭色之分離,較稃尖色複什。除與前人報告相同者外,並發現一新的分離現象(13有色:3無色)。 至於矮性因子(d31)、細葉(nal)、石炭酸反應因子(Ph)、無葉舌因子(lg)、密穗因子(Dn)、向地性(la)、莖葉脆性(bc)、等性狀本研究中發現均受一對遺傳因子所支配。而另在連鎖研究中發現,矮性因子(d31)、紫穎色因子(Pr)、紫色柱頭因子(PS2)、石炭酸反應因子(Ph)及無葉舌因子(lg)與細葉因子(nal)間等均有明顯的連鎖關係。且這些因子均屬於Nagao之第二染色體連鎖羣。但細葉因子(nal)卻和稃尖因子(C)、矮性因子(7245-d)、密穗因子(Dn)、莖葉脆性(bc)及向地性因子(lg)等因子相互獨立。 D-155-8, an X-ray induced dwarf mutant from Taichung no. 155, is measured about 70 cm in height at maturity, and the leaves being narrow and dark green in color. This strain was crossed with three gene markers of rice and five...
Palavras-chave: [[classification]]6.
Ano: 1968
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水稻經放射線處理後之變異(預報) Taiwan Agricultural Research Institute
嚴盛添; S.T. Yen.
[[abstract]]本試驗在研究水稻經放射線處理後號,農藝性狀和花粉母細胞染色體之變異情形,乃利用臺中65號、嘉南8號、臺中在來一號和鳥尖之乾燥種子,經x射線、r射線(鈷60)和熱中子處理後,栽培於溫室和一般環境下,觀察其變異情形。 試驗結果顯示處理當代發芽率,死亡率等受放射線之影響,且因線源和線量之不同而異。品種之間亦有相當大之差異。幼苗高度因處理而呈現抑制的現象,成熟期之株高和穗長,亦有相同之結果。分蘗數及穗重,臺中65號和嘉南8號均呈仰制現;臺中在來一號和鳥尖則以x射線20kr處理者,呈促進現象,其他亦呈抑制之情形。各處理區之平均抽穗期和生育日數與未處理者相同或長1~10天左右。但若以個體來說,除大部分較未處理者晚之外,尚有部份則較未處理都早抽穗。因此可說,之株高,穗重和穗長之間的關情形,因品種而異。染色體變異方面,在第一分裂中期,可發現有單價、双價和四價體等。構造上亦可發現有斷片、滯留和產生染色體橋等之變異現象,且其四價體產生之頻度和處理線量成正比。同時,顯示x射線的效果也稍強於r射線處理之效果。 In order to study the effects of different radiation treatments on agronomic characters and chromsomes, four varieties of rice (both japonica and indica) were sent to National Genetics Institute of Japan for X-rays and thermal neutron treat-ments; in the same time, seeds of Taichung no. 65 (japonica...
Palavras-chave: [[classification]]6.
Ano: 1965
Registros recuperados: 3
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