- 作者: 謝順景;郭益全
- 作者服務機構: 臺灣省農業試驗所
- 中文摘要: 本實驗以?稻臺南5號,秈稻嘉農秈11號之雜交F2?材料,以探討米粒蛋白質含量及其他性狀之遺傳行?,俾便明瞭豐產且高蛋白?稻品種育成之可能性°試驗結果獲知: (1)臺南5號之米粒蛋白質含量介於7.94?9.20%之間,平均8.71% ,嘉農秈11號則介於10.42~13.97%之間,平均11.72% ,約高臺南5號34%左右。集?之含量變異?7.64?14.13% ,有向正負兩方向超越雙親的植株分離,平均含量10.23% ,約等於兩親之中間?。 (2)蛋白質含量之遺傳率估計?68% ,表示在環境因子影響較小之情形下,此性狀在早期之選拔效果可能甚大,蛋白質 含量可能受一對主效基因及微效基因所控制。 (3)就一般而言,遣傳相關較表現型相關?大,蛋白質含量與其他農藝性狀如株高、穗數、千粒重及結實率之間成負相關關係。 (4)蛋白質含量與芒之有無並無顯著之關係存在,亦?芒之有無不能作?高蛋白植株之選拔指標。 (5)在本試驗中之蛋白質含量之選拔效率之評估中得知,在秈?稻之雜交後代中選拔具有高蛋白質含量之?型稻品種之可能性甚大。
- 英文摘要: Protein variability, heritability, the number of effective genes as well as phenotypic and genetic correlations among various characters were studied with the F2 population of indicax japor.ica rices. The results of the experiments are summarized as follows: (1) Protein content of Tainan 5 (japonica type) ranged from 7.94% to 9.20%, with a mean of 8.71%; that of Chianung-Sen 11 ranged from 10.42% to 13.97% with a mean of 11.72%. Protein content in F2 exceeded both parental varieties toward both positive and negative directions with the range of 7.64%-14.13% and a mean value of 10.23% which was also the mid-value of the two parental varieties. (2) Heritability value of protein content was estimated to be 68%, indicating that selection efficiency and genetic advance in the indica莌aponica cross could be high. It was determined that protein content is controlled by a pair of major gene plus minor genes. (3) In general, genetic correlation is larger than phenotypic correlation. Protein content was found to correlate negatively with other agronomic characters such as plant height, panicle number, 1,000 grain weight and percent seed set. (4) Little correlation between protein content and presence or absence of awns was observed, indicating that awness can not be used as an indicator for selecting high protein lines in a breeding program. (5) It was considered from evaluating the selection efficiency for high protein lines that high protein lines of japonica type could be selected from this indica莌aponica cross.
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