稉稻新育成品系米質增進之研究

The Grain Quality of Newly Releasing Japonica Rice Lines

黃秋蘭(Chiou-Lan Huang) ； 江瑞拱(Jui-Kung Chiang) ； 洪梅珠(Mei-Chu Hong)

《臺東區農業改良場研究彙報》 11輯 (2000/12) Pp. 1-15

https://doi.org/10.6959/RBTDAIS.200012.0001

摘要

本場稉稻良質米育種選育之新品系（種）自86年1期作至88年2期作共計39品系（種），各品系（種）分別分析1、2期作之米質。分析結果發現品系間之碾米品質有不同的表現，在不同年期中都可發現比對照品種台農67號碾米品質好的新品系，尤其是完整米率，多數的新育成品系比台農67號其較高的完整米率。新品系之粒長僅有二品系屬中短粒，其餘皆屬短粒，粒形全為粗圓形。新育成品系之心腹背白的變異係數較其他性狀大，顯示品系間之心腹背白仍有選拔空間，且於每年期皆可發現沒有心腹背白且透明度比台農67號好的新品系。新品系大多為低糊化溫度、低直鏈性澱粉含量。蛋白質含量有一新品系高於7%，其餘新品系之蛋白質含量皆在7%以下。凝膠展延性有三品系為中膠體，其餘新品系之凝膠展延性皆為軟膠體。顯示多數新品系的米質大多已得到提升與改善，因此高品質、食味佳的良質米其育種目標是可預期的。

關鍵字

稉稻 ； 米質

並列摘要

From the first crop of 1997 to the second crop of 1999, a total of 39 newly nominated japonica rice lines which were selected from Taitung District Agricultural Improvement Station (DAIS), were collected to test their grain quality. The results showed that there were differences in milling quality among those new lines. In each crop, there were some new lines better than TNG67 (ck) in milling quality. Most of new lines were larger than TNG67 (ck) in head rice rate. Most of those lines belonged to short grain size and bold shape, and only two lines belonged to shot-medium grain size.The coefficients of variation of white center, white back and white belly were larger than the rest characters, and those showed we have more selection chance in white center, white back and white belly. In each crop, there were some new lines better than TNG67 (ck) in grain appearance.Most of new lines belonged to low gelatinization temperature, low amylose content, low protein content and soft gel consistency, and only one line which protein content was over 7%, only three lines belonged to medium gel consistency.

並列關鍵字

japonica rice ； grain quality