利用r線誘導染色體轉座減少西瓜種子數之研究(II)小鳳西瓜染色體多轉座同型及異型結合體之育成
Other Title
THE REDUCTION OF SEED NUMBER OF WATERMELON THROUGH CHROMOSOMAL TRANSLOCATION INDUCED BY r-RAY IRRADIATION II. DEVELOPMENT OF HOMOZYGOTES AND HETEROZYGOTES OF MULTIPLE TRANSLOCATION IN HSIAOFENG VARIETY
Series/Report No.
臺灣省農業試驗所報告; 32
Start Page
54
End Page
61
Date Issued
1975-05
Date
1975-05
Author(s)
邱阿昌
Chieu, A-chang
Abstract
利用故射線處理西工種子誘導染色體轉座（Chromosomal translocation）後，從轉座異型結合體（Translocation heterozygote）之自交分離後代，可以選出轉座同型結合體（Translocation homozygote）系統，此轉座同型結合體之自交後代可以固定，不再分離，因而如將此系統與正常西瓜雜交，或將轉座位置不在相同染色體上之二個同型結合體系統雜交，則又可產生染色體轉座異型結台體，此轉座異型結合體因花粉及胚珠稔性降低關係，使西瓜果實內部份種子不發育而可減少正常種子數。如果異型轉座次數增加，則正常種子數減少愈多(2)(3)。筆者在1972年已培育9個系統之二對染色體間相互轉座之單轉座同型結合體之小鳳西瓜，其果寶特性艾種子數與正常小鳳西瓜相似，但以此與正常小鳳西瓜雜交所得之F1，則為單轉座異型結合號，其果實內種子數可減少38%(1)。本研究為機續以往之試驗，一方面將單轉座同型結合煙進行系統間雜交，以產生雙轉座異型結合體；一方面繼續用r線處理單轉座同堅結合體之種子，以誘殺新的染已體轉座，並行純系分雉，選出多轉座同型結合體，利用為親本而產生多轉座異型結合搜，以遠到減少更多種子數之日的。
Several F1 hybrids with double chromosornal translocation heterozygote of Hsiao-feng watermelon were developed from the crosses between two single translocation homozygote tines. The developed seeds in the fruits of these F1 hybrids were reduced dramatically and each fruit contains around 25 to 75 seeds. But the poor fruit-set ability, small fruit size and abnormal fruit shape were found in these F1 hybrids although the plants are vigorous.
Three double translocation homozygote lines were also developed from the previous developed single translocation homozygotes by r-ray irradication. Multiple translocation heterozygotes were obtain from the crosses of these lines which contained only ten or more seeds per fruits. But the poor fruit-set ability should be overcome before for commercial production of this type of watermelon.
Publisher
臺灣省農業試驗所
Description
封面名稱為：臺灣省農業試驗所研究彙報第32號
Type
report
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