关键词: 水稻;核心种质;广适性;耐热性;分子育种

Abstract:

Huanghuazhan is a rice variety developed by integrated breeding objectives of semi-dwarf, super high yield and good quality in China. With better quality than controls of Yuexiangzhan and Texianzhan 25 in cooking quality and exterior appearance, Huanghuazhan also has higher yield  than that of controls. Its yield is 30% higher than Qiguizhan. Besides yielding higher than Shanyou 63, it matures 6 days earlier. Its quality is of the first grade by international rice standard and 3 grades above Shanyou 63. It yields the same as Liangyoupeijiu, but matures 7 days early than Liangyoupeijiu. And its quality is of first grade by the rice criterion of Agriculture Ministry, 2 grades higher than Liangyoupeijiu. In production of extensive areas, Huanghuazhan is tolerant to high temperature with wide adaptability and strong resistance to lodging. It has been registered in 5 Provinces and 1 Autonomous Region as Guangdong, Hubei, Hunan, Guangxi, Hainan, Zhejiang, and was introduced into Nanchang, Shangrao Cities of Jiangxi Province. It will be advanced to re-trials in Chongqing City, Shanxi, Yunnan Provinces, and the midle and low reaches of Yangtze River in 2010. Up to now, 5 varieties and 4 elite lines have been derived from Huanghuazhan. Huanghuazhan has been planted in 1.0068 million hm2 in southern China rice production region and has gained 3.4 billion Yuan in social economic benefits.

Key words: rice, core germplasm, wide adaptability, tolerance to high temperature, molecular breeding