优质抗白叶枯强毒菌系V型菌水稻新品种白粳占的选育

摘要

Baigengzhan is a new thermo-sensitive inbred rice variety carrying xa-5 gene against the virulent pathotype V of rice bac-terial blight and blast, derived from the local breeding material with fine quality and high yield. It showed good resistance to the viru-lent pathotype V of rice bacterial blight and blast, grain quality as provincial standard level 3, and high yield equaled to the control variety Yuxiangyouzhan in the regional trial of Guangdong Province. Baigengzhan can be planted as early season rice in all Guang-dong Province except northern area, particularly suitable for the epidemic area of the virulence pathotype V of bacterial blight, such as Jiangmen, Yangjiang, Zhanjiang and Leizhou Peninsula.%白粳占是以五百粒与粳籼89杂交的中间材料为母本，与广东省优质丰产地方品系抗白粳籼占杂交选育而成的感温型常规稻品种。该品种抗白叶枯病强毒菌系V型菌（1~3级）兼抗稻瘟病，产量与区试对照品种玉香油占相当，米质达到省标优质3级。适宜广东省粤北以外稻作区早季、中南和西南稻作区的平原地区晚季种植，特别适合广东省珠江口以西，水稻白叶枯病强毒菌系V型菌主要发病稻作区江门、阳江、湛江及雷州半岛地区种植。