水稻抗褐飛蝨育種方法之研究

Studies on the Techniques of Breeding Rice for Resistance to the Brown Planthopper

楊遜謙(S. C. Yang)

《中華農業研究》 29卷4期 (1980/12) Pp. 273-282

https://doi.org/10.29951/JARC.198012.0004

摘要

本試驗自民國65年7月至67年6月在嘉義農業試驗分所進行，其目的在於利用世代促進法兼行抗蟲性之檢定，以提高抗蟲育種之效果。初步結果顯示在世代促進法繁殖之水稻早期分離集團實施對褐飛蝨之抗蟲性檢定時可提高各集團之抗蟲率，有利於抗蟲系統之選拔，而對育成系統之生產力及主要農藝性狀則均無不良之影響。此外，世代促進法與抗蟲檢定之併用不但可節省很多人力與物力，而且年可繁殖三世代，有縮短育種年限之效果。
在世代促進法繁殖之水稻分離集團中進行抗蟲檢定時，其接蟲時間以5~7日爲宜，切勿過長以免淘汰中抗程度之個體或影響檢定後幼苗之復原。
初步結果顯示在F2及F4世代行抗蟲檢定而F3世代不檢定時其感蟲後代之淘汰率與每世代均檢定者相若，顯示簡化抗蟲性之選拔，並不影響其育種效率。

並列摘要

This experiment was conducted from July 1976 to June 1978 at the Chiayi Agricultural Experiment Station with the objective of improving the efficiency of breeding rice for resistance to the brown planthopper by screening for insect resistance in the segregating generations treated with Repid Generation Advance (RGA) method. Preliminary results indicated that screening made in the RGA populations improved the efficiency of selection by raising the percentages of insect-resistant segregants in the segregating generations without adversely affecting the yield and other agronomical characters of the selected lines. Moreover, RGA made it possible to harvest three generations a year, resulting in a great saving of labors and time.
The optimum period of insect feeding in RGA populations appeared to be between 5 to 7 days. Over-feeding could result in the elimination of moderately resistant segregants in the populations.
Screening made in F2 and F4 but not in F3 generations gave the percentages of susceptibles comparable to those screened in each of the three generations, indicating that screening for insect resistance in RGA populations can be further simplified.