期作對高粱自交系及F1雜交種生育的影響

The Influence of Cropping Season on the Growth and Yield of Inbred and Hybrid Sorghum [Sorghum bicolor (L.) Moench]

10.6956/BTDAIS.199212.0031

黃勝忠(Sheng-Chung Huang)

高粱 ； 期作 ； 自交系與雜交種 ； 生育 ； 產量 ； Grain sorghum [Sorghum bicolor (L.) Moench] ； cropping season ； growth duration ； grain yield

臺中區農業改良場研究彙報

37期（1992 / 12 / 01）

31 - 40

繁體中文

利用8個高粱自交系（4個B-line與4個R-line）以及A-line與R-line相雜交的8個F1雜交種為試驗材料，種植於春秋兩個季節，分析自交系及F1品種產量形成過程之變異。1991年秋作與1992年春作的結果，發現栽植地區對高粱自交系與F1雜種的影響不顯著，但對季節間之反應變異很大，而且高粱自交系與雜種F1間常因季節之變化而反應不一致。由生育日數之變異發現達到開花期所需的日數春作顯著大於秋作，但全生育日數與實際穀粒充實日數則呈現秋作大於春作的趨勢，而一般雜種F1的各階段生育期比其親本短。不同栽培季節下的產量及各主要農藝性狀的平均值，除自交系及雜種F1之千粒重在期作間差異不顯著外，其它性狀均以秋作顯著大於春作。春作高粱之產量與生育日數長短呈負相關，但秋作則相反。

Eight sorghum inbred lines and eight F1 hybrids were grown at two locations in the fall cropping season of 1991 and spring cropping season of 1992. Several important agronomic characters were investigated and the grain yield was evaluated to compare the performance of inbreds and hybrids between different cropping seasons. Experimental results indicated that for all traits, significant difference was observed between two cropping seasons but not between the two locations. The investigation of growth duration showed that the days from emergence to flowering were less in the fall than in the spring season. On the contrary, the total growth period and the actual grain-filling period were longer in the fall crop season. In general, the hybrids grew faster than their respective parental inbred lines. For the comparison of the means of agronomic traits, significant differences were observed between the two cropping seasons for both the inbred lines and the hybrids for all traits with the only exception of 1,000-seed weight. The correlation between grain yield and growth duration was negative in the spring crop but positive in the fall crop.