Method for breeding small-grain sterile rice line and simple method for producing hybrid rice seed

US11246275B2 · kind B2 · utility

Assignees

• HUNAN AGRICULTURAL UNIVERSITY · CN
• HUNAN HOPING SEEDS SCIENCE & TECHNOLOGY INCORPORATED COMPANY · CN

Inventors

• Wenbang Tang · Changsha, CN
• Yuedong Xiong · Changsha, CN
• Xincai Ding · Changsha, CN
• Guoliang Yi · Changsha, CN
• Guihua Chen · Changsha, CN
• Huabing Deng · Changsha, CN
• Guilian Zhang · Changsha, CN
• Yue WANG · Shanghai, CN
• Xingquan Ming · Changsha, CN
• Qiang Xu · Hangzhou City, CN
• Ning Feng · Arcadia, US

Key dates

• Filing date: Jul 18, 2017
• Grant date: Feb 15, 2022
• Expiry date: Dec 25, 2037

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A01H6/4636
• WIPO field: Food chemistry
• WIPO sector: Chemistry

Abstract

A method for breeding a small-grain male-sterile rice line and a simple method for producing a hybrid rice seed are provided. The method for breeding the small-grain sterile rice line includes the following steps: crossing a female parent C815S with a male parent Qigui B to obtain a hybrid seed F1; planting the F1 and crossing the F1 with a female parent H155S to obtain a crossed hybrid seed F1′; planting the crossed hybrid seed F1′ to obtain a F2′ generation; planting an individual plant with ideal plant type, strong tillering, plant dwarf and small grain type from the F2′ generation and a F3′ generation, and then directional breeding more than two generations to obtain a seed with more than F5′ generation as the small-grain sterile rice line.