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中国生物工程杂志

China Biotechnology
China Biotechnology  2017, Vol. 37 Issue (12): 21-26    DOI: 10.13523/j.cb.20171204
Orginal Article     
Research on High Yield Breeding of Super Early Indica Rice “Zhongzao 39”
Zhi-juan JI,Yu-xiang ZENG,Yan LIAN,Chang-deng YANG()
State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China
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Abstract  

Early Indica rice variety “Jiayu 253” and “Zhongzu 3” were used as parents to breed a new variety “Zhongzao 39” through pedigree method and yield comparison trial. Natural disease nursery and artificial inoculation of mixed strains of blast for each segregation generation were conducted. The variety “Zhongzao 39” and its pedigree parents “Jiayu 253” and “Zhongzu 3” were further compared on yield related traits, photosynthetic characters, leaf area indexes and photosynthetic pigment contents. Results showed that total grain number per panicle and seed setting rate of Zhongzao 39 were higher than that of its pedigree parents, indicating its excellent sink. The highest net photosynthetic rate of Zhongzao 39 was demonstrated 20 days after the stage of full heading stage. Its leaf area index and photosynthetic pigment content were showed the most high as well. Therefore, Zhongzao 39 demonstrated elite photosynthetic physiological characters for high yield. Using high-yield pedigree parents in breeding and integration of elite traits during breeding contribute to the high-yield of Zhongzao 39. The super high yield advantage is obtained from source sink optimization, improvement of plant leaf morphology and performance of late-stage vigor super hybrid rice characters during rice breeding, which gives reference information for rice high-yield breeding.



Key wordsIndica rice      Zhongzao 39      High yield      Breeding      Physiological characters     
Received: 30 November 2016      Published: 16 December 2017
ZTFLH:  Q819  
Cite this article:

Zhi-juan JI,Yu-xiang ZENG,Yan LIAN,Chang-deng YANG. Research on High Yield Breeding of Super Early Indica Rice “Zhongzao 39”. China Biotechnology, 2017, 37(12): 21-26.

URL:

https://manu60.magtech.com.cn/biotech/10.13523/j.cb.20171204     OR     https://manu60.magtech.com.cn/biotech/Y2017/V37/I12/21

Fig.1 Breeding process of the variety Zhongzao39
年份 叶瘟 穗瘟 综合指数 稻瘟病抗性评价
平均 最高 发病率(%) 病级 损失(率%) 病级
2008 0 0 3.5 1.5 2 0.5 0.6
2009 0 0 0 0 0 0 0 高抗
2012 0 0 3 1.5 0.6 0.5 0.6
2013 0 0 0 0 0 0 0 高抗
2014 2.5 5 4 5 1 1 2.8 中抗
2015 2 3 3 3 1 1 2
2016 1.3 3 7 1 3 中抗
2017 0.7 1 5 1 2
Table 1 Blast resistance of Zhongzao 39 in Zhejiang province regional test
品种 全生育期
(天)
株高
(厘米)
有效穗数
(万/亩)
每穗总粒数 结实率
(%)
千粒重
(克)
小区产量
(公斤/亩)
中早39 112 86.87 aA 16.66 bAB 151.82 aA 94.1 Aa 26.16 aA 508.95 aA
中组3号 113 85.43 aA 13.78 bB 115.13 Bab 93.5 aA 25.42 aA 326.94 cC
嘉育253 112 90.15 aA 22.34 aA 135.40 bB 81.5 bB 26.51 aA 482.87 bB
Table 2 Comparison of yield traits between the three varieties
Fig.2 Comparison of net photosynthetic rate among the three varieties
Fig.3 Comparison of leaf area index amonge the three varieties
Fig.4 Comparison of chlorophyll a content among the three varieties
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