The Institute of Subtropical Ecology of the Chinese Academy of Sciences has cultivated high-quality rice varieties with "three antibodies"

On November 30, the Ministry of Agriculture and Rural Affairs issued Announcement No.
625, and the new hybrid rice variety Keguiyou 4302 declared by the Institute of Subtropical Agroecology of the Chinese Academy of Sciences passed the examination and approval
of the National Crop Variety Validation Committee.

Keguiyou 4302 (National Rice 20220226) is mainly bred by the Institute of Subtropical Ecology and cooperated with the Rice Research Institute of Guangdong Academy of Agricultural Sciences and China Seed Group Co.

, Ltd.
Keguiyou 4302 showed medium resistance to rice blast, medium resistance to white leaf blight, and medium resistance to brown planthopper in the late rice area of the middle and lower reaches of the Yangtze River, and at the same time, the quality reached the third level of the part standard of high quality, and the yield increased by 1.
9% compared with the control, which is the first high-quality rice variety
resistant to these three diseases and pests in China.

The rice molecular breeding team of the Institute of Subtropical Ecology is committed to the research of molecular design breeding of rice multi-resistance traits, adopts the breeding method of close combination of conventional breeding and molecular breeding technology, gives full play to the role of molecular breeding technology in improving quality traits such as resistance, and gathers at least three kinds of resistance with important production and application value in one variety, which sets a new technical benchmark
for rice breeding.

At the same time, China Seed Group Co.
, Ltd.
used the "three antibodies" recovery line R4312 cultivated by the subtropical ecology to select and breed a new variety of "double antibody", high-quality and high-yield hybrid rice with two excellent 4312, and passed the national examination (national review rice 20220111).

It was shown as medium resistance to rice blast and medium resistance to brown planthopper in the middle and lower reaches of the Yangtze River, and the rice quality reached the standard quality grade 2, and the yield increased by 4.
1%
compared with the control.

Xiao Guoying, the leader of the team, said that it is necessary to continue to strengthen exchanges and cooperation with research institutes and enterprises across the country, authorize the cultivated "three antibodies" parents to relevant matches, and improve the breeding technology level
of multi-antibody, high-quality and high-yield hybrid rice.

(Edited by Li Chuang)