頁籤選單縮合
題 名 | 蜀黍族群農藝性狀之變異及相關=Variations and Correlations of Agronomic Characters of Populations in Sorghum |
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作 者 | 江明樹; 陳成; | 書刊名 | 中華農學會報 |
卷 期 | 181 1998.03[民87.03] |
頁 次 | 頁26-47 |
分類號 | 434.155 |
關鍵詞 | 格式混合選種法; 農藝性狀; 相關係數; 因子分析; 主成份分析; Gridded mass selection; Agronomic characters; Correlation coefficient; Factor analysis; Principal component analysis; |
語 文 | 中文(Chinese) |
中文摘要 | 本試驗在臺中利用格式混合選種法(ghdded mass selection)進行兩年度春、秋 分季各二個循環的輪迴選種以改良NTUACO基礎族群。約在12%的選拔壓力下,於兩年度春 、秋二季分別選拔早熟、矮株且穗型優越的雄不稔植株,每株取等量種子混合而得NTUAS l、NTUAFCl、NTUASC2及NTUAFC2四改良族群。於不同季節下所種植族群之植株,在開花期 、莖徑及綠葉數等農藝性狀皆有顯著差異存在,此表示不同季節的輪迴選種具有不同的改 良效果。 於臺北引進臺南改良場所創建之基礎族群(TNC0),並與NTFUAC0族群相間隔行種植, 同時進行此二族群的相互改良。經三次的格式混合選種法後,共選得NTUA(A)Cl、TN(A) Cl、NTUA(S)C2、TN(S)C2、NTUA(R)C3及TN(R)C3六改良族群。二基礎族群之植株在開花期 、株高、莖徑、綠葉數及穗長等農藝性狀上均有顯著差異存在,表示此二族群具有相互改 良的效果。兩改良一代族群(Cl)植株各農藝性狀之表現皆無顯著差異存在,此表示經一次 之相互種質導入後,由於子代Cl族群各帶有兩基礎族群之一半種質,將使植株之表現趨於 一致。而再經一代自交之改良族群(C2)則在莖徑與穗長之表現有顯著差異存在。 各族群除開花日數之變異係數較小外,其他性狀之變異係數皆相當大,可見族群具有 廣泛的變異,因此可利用輪迴選種法進行族群的改良。由各族群農藝性狀間之相關係數可 知各性狀間常有相關性存在。利用因子分析法,亦可說明各族群農藝性狀間的關係。而由 主成份分析法可將族群依其在重要主成份座標軸上分布之遠近分為三類,並得知參試族群 間之差異主要受地區、季節等環境因子之影響,所以本省蜀黍宜採分區、分季進行族群之 育種改良。 |
英文摘要 | The base population (NTUACO) was improved by two cycles of gridded mass selection in spring and fall respectively in two years at Taichung. Four improved populations, NTUASCI, NTUAFCI, NTUASC2 and NTUAFC2, were obtained by pooling the seeds equally from each selected male sterile plants with early mature, dwarf and superior panicle type under 12% selection pressure in spring and fall of two years respectively. There were significant differences for days to flower, stalk diameter and green leaf number among these populations planted at the different crop seasons. It indicated that there were different improvement effects when recurrent selection was performed in the different seasons. The base population (TNCO) introduced from Tainan DAIS and the NTUACO population were planted on alternate lines in order to improve each other simultaneously in Taipel. Six improved populations, NTUA(A)C1, TN(A)C1, NTUA(S)C2, TN(S)C2, NTUA(R)C3 and TN(R)C3, were obtained by three cycles of gridded mass selection. There were significant differences for days to flower, plant height, stalk diameter, green leaf number and panicle length between two base populations. It indicated that two base populations perhaps had improvement effect each other. There were not significant differences for any agronomic characters between two populations improved one generation (C1). It indicated that the two C1 populations had same performance due to having half germplasm equally from each base population by the first cross. But there were significant differences for stalk diameter and panicle length between two improved populations (C2) by selfing one generation again. The coefficient of variation of agronomic characters were very large except days to flower for each population. It implied that population could be improved by recurrent selection due to having broad variation. There were correlations among most agronomic characters for each population. The correlation also could be explained by the factor analysis. These populations could be classified into three groups by their distances on the important principal component coordinate plane. It indicated the differences among these populations were affected mainly by the environment factors such as locations and crop seasons. So, population improvement of sorghum was advised to perform at distinguish locations and crop seasons in Taiwan. |
本系統中英文摘要資訊取自各篇刊載內容。