Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/37251
標題: 栽培稻遠緣雜交F1稔性變異之研究
Variation In F1 Fertility Of Distantly Related Crosses Among Cultiveated Rice
作者: 王毓華
Wang, Yu-Hua
關鍵字: 栽培稻遠緣雜交;F1稔性變異
出版社: 農藝學系
摘要: 
為探討栽培稻遠緣雜交F1不稔性之變異,本試驗以Silewh及臺□育3484與5個日本型品種及4個印度型品種進行7 ×7及6 ×6全互交F1及F2分離族群為材料,調查花粉稔性及種子稔實率。探討雜交不稔性之遺傳行為以及不同栽培時期對不稔性之影響。結果如下:
1. Silewah與日本型品種之雜交F1花粉稔性較與印度型品種之雜交F1高,第一期作也較第二期作高;種子稔實率也有類似之趨勢。而臺□育3484與印度型品種之雜交F1花粉稔性較與日本型品種之雜交F1高,第一期作也較第二期作高;同樣地種子稔實率也有類似之趨勢,然而第一期作與第二作間則無顯著差異。
2.在不同栽培時期,雜交F1之花粉稔性及種子稔實率具有顯著差異。其中5個親本的花粉稔性與種子稔實率大致不因栽培時期而異。而其雜交F1則隨著栽培時期之不同,花粉稔性與種子稔實率均有差異,也因遺傳背景之不同而有差異。
3.由日本型組合7×7全互交及印度型組合6×6全互交之遺傳分析發現,顯性作用在花粉稔性及種子稔實率的遺傳上扮演的角色;稔性之遺傳主要受主效基因控制,且至少有一對基因作用;日本型組合之花粉稔性及種子稔實率的狹義遺傳率分別為63%及54%;印度型組合之花粉稔性及種子稔實率則分別為34%及42%。
4.由6組雜交組合F2分離族群之花粉稔性與種子稔實率的分離比,發現控制花粉稔性與種子稔實率有9:7兩對互補基因;13:3兩對抑制基因;15:1兩對重複基因、3:1一對完全顯性基因。

Variation in the F1 fertility of distantly related crosses among cultivated rice was commonly observed and was recognized as a heritable trait. A series of experiments including two diallel cross sets: a 7×7 diallel cross of Silewah, TKY3484 and 5 Japonica varieties, a 6×6 diallel crosses of Silewah, TKY3484 and 4 Indica varieties, and a total of 12 F2 populations were used as materials to understand the genetic behaviors of the F1 hybrid fertility and variation due to different planting dates. The pollen fertility and spikelet fertility, considered as index traits of fertility, were evaluated.
1. The pollen fertility and spikelet fertility of Silewah with Iaponica varieties were higher than with Indica varieties, and those of the first crop was higher than the second crop Similarly, the pollen fertility of TKY 3484 with Indica varieties were higher than with Japonica varieties, and those of the first crop was higher than the second crop. However, the differences between the first and the second crops were not signiticant different.
2. The pollen fertility and spikelet fertility of the five parents were similar in different planting dates. However, in different planting dates, the pollen fertility and spikelet fertility of hybrid F1 were significantly different.
3. Genetic analysis from the 7×7 diallel crosses of Japonica and the 6×6 diallel crosses of Indica, the pollen fertility and spikelet fertility were controlled dominant genes, The hybrids fertility was controlled by at least one major genes. Heritabilities of the pollen fertility and spikelet fertility in Japonica crosses were 63% and 54% in narrow sense, respectively. Heritabilitles of the pollen fertility and spikelet fertility in Indica crosses were 34% and 42% in narrow sense, respectively.
4. To study the segregation for pollen fertility and spikelet fertility of distantly related crosses in rice, six F2 populations were investigated. The F2 popultion might be chassified into two groups, i. e. normal and low fertility groups. The segregation pattern in F2 is regardes as 9 : 7, 13 : 3, 15 : 1, and 3 : 1, respectively. Those suggest that the hybrid sterility were induced by a set of complementary, inhibiting genes, duplicate genes, and a complete dominant gene, respectively.
URI: http://hdl.handle.net/11455/37251
Appears in Collections:農藝學系

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