HUBEI AGRICULTURAL SCIENCES ›› 2019, Vol. 58 ›› Issue (21): 15-21.doi: 10.14088/j.cnki.issn0439-8114.2019.21.003

• Breeding & Cultivation • Previous Articles     Next Articles

Breeding of "four special" rice varieties and its significance

ZHOU Qiang, WANG Huan, LI Xing-hua, LYU Rui-ling, ZHANG Sheng, CAI Xing-xing   

  1. Huanggang Academy of Agricultural Sciences,Huanggang 438000,Hubei,China
  • Received:2019-06-09 Online:2019-11-10 Published:2019-11-27

Abstract: More than 300 groups were got crossing by a large number of restorer lines and three-line sterile Yi 33 A, Yi 133 A with ultrashort growth period, thick stem, large spike, high quality, blast resistance and strong combining ability from 2015 to 2018. And variety comparative tests including late indica rice variety comparative test of Hubei province in 2017 were carried out. The results show that, "four special" rice (Oryza sativa L.) varieties with ultrashort growth period, the whole growth period shorter 0 to 8 days than control variety Jinyou 207. "Four special" rice varieties have higher yield, the general yield is about 8 400 kg/hm2 and the highest yield is up to 12 150 kg/hm2. In general, compared with control variety Jinyou 207, "four special" rice varieties with a 10% increase in production and the biggest increase rate can reach more than 30% under lower fertility level. In additional, "four special" rice varieties with grain structure of middle-season rice varieties and high nitrogen efficiency. "Four special" rice varieties have good quality, 12.2%, 41.5% and 43.9% varieties in the tested varieties can reach GB Ⅲ, Ⅱ andⅠ, respectively. "Four special" rice varieties have strong resistance to lodging because of strong and medium stem (plant height was about 100 cm), high resistance to rice false smut, resistance to rice blast and so on.

Key words: "four special" rice (Oryza sativa L.) varieties, three-line, sterile line

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