Breeding of commercially acceptable allelopathic rice cultivars in China
Breeding of commercially acceptable allelopathic rice cultivars in China
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中国商业上可接受的化感水稻品种的选育
DOI：
10.1002/ps.2154
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发表时间：
2011-09-01
影响因子：
4.1
通讯作者：
Zhang, Song-Zhu
中科院分区：
文献类型：
--
作者：
Kong, Chui-Hua;Chen, Xiong-Hui;Zhang, Song-Zhu
背景：开发水稻的抑草潜力是水稻杂草控制的一个很有前途的领域。本研究以化感水稻品种PI 312777为材料，与中国水稻品种进行杂交，培育具有化感作用的水稻新品种（N2 S、N9 S、华恢354、培矮64 S和特华占35），并与亲本比较，评价它们对稻田杂草的抑制作用和水稻产量。华恢354 × PI 312777和N2 S × PI 312777为正显性，N9 S × PI 312777、培矮64 S × PI 312777和特花占35 × PI 312777为隐性或负显性。华恢354 × PI 312777和N2 S × PI 312777对杂草的抑制作用强于亲本和其它组合。最后，从华恢354 X PI 312777获得了具有接近于华恢354的外观和接近于PI 312777的杂草抑制幅度的F-8品系。该品系被命名为华感3号，是我国第一个可商业化的化感水稻品种。华赣3号的产量和品质均达到当地水稻产业标准。华感3号对水稻杂草的抑制作用很强，但抑制作用受年际变化和种植密度的影响。结论：高产、抑草能力强的华感3号的选育成功，可为今后水稻生产中减少除草剂的使用提供参考。(C)2011年化学工业协会
BACKGROUND: One promising area of paddy weed control is the potential for exploiting the weed-suppressing ability of rice. This study was conducted to develop commercially acceptable allelopathic rice cultivars using crosses between allelopathic rice variety PI312777 and commercial Chinese cultivars (N2S, N9S, Huahui354, Peiai64S and Tehuazhan35), and to assess their weed suppression and grain yield in paddy fields in relation to their parents.RESULTS: There was a positive dominance in the crosses Huahui354 x PI312777 and N2S x PI312777 but recessive or negative dominance in N9S x PI312777, Peiai64S x PI312777 and Tehuazhan35 x PI312777. Huahui354 x PI312777 and N2S x PI312777 showed stronger weed suppression than their parents and other crosses. Finally, an F-8 line with an appearance close to Huahui354 and a magnitude of weed suppression close to PI312777 was obtained from Huahui354 x PI312777. This line, named Huagan-3, was released as a first commercially acceptable allelopathic rice cultivar in China. The grain yield and quality of Huagan-3 met the commercial standard of the local rice industry. Huagan-3 greatly suppressed paddy weeds, although suppression was influenced by year-to-year variation and plant density. There was no certain yield reduction in Huagan-3 even under a slight infestation of barnyard grass in paddy fields.CONCLUSION: The successful breeding of Huagan-3 with high yield and strong weed suppression may be incorporated into present rice production systems to minimise the amount of herbicide used. (C) 2011 Society of Chemical Industry