高异交率光温敏核不育系荃211S的特征特性、配组应用及高产制种技术

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中图分类号 S511 文献标识码A 文章编号 1007-7731(2025)24-0014-06

DOI号 10.16377/j.cnki.issn1007-7731.2025.24.004

Characteristics,combination application,and high yield seed production technology of Quan 211S,a photothermosensitive genic male sterile line with high outcrossing rate

LYU JialinCUI Huihui GAO Shengcong SHI Kun ZHUChangdongSU Xiangzhong PAN Hua ZHANG Zhihar (Key Laboratory of Hybrid Rice New Variety Creation, Ministry of Agriculture and Rural Affairs, Win-all Hi-tech Seed Co.,Ltd.,Hefei230088,China)

AbstractQuan 211S is a high quality sterile line developed through hybridization of sterile line1892S as the female parent and sterile line O3Sas the male parent.It is widely used in varietybreeding.The characteristics of this sterile line,itscombination application,and high yield seed production techniques were introduced.This sterile line belongs to the polen-free type,with colorless glume tips and white stigmas.It has a compact plant type,thick andstrong stems,anda high milled rice rate.The hybrid varieties developed from it have excellent grainqualityand good resistance,with broad market application prospects. Currntly,there are 27 approved varieties developed using Quan 211S as the female parent,such as Quanliangyouyuemiao and Quanliangyou 985. The high yield seed production techniques include selecting hilly areas with good natural conditions such as temperature and light,and an altitude not exceeding 300m ,with a sowing period in June and the heading period arranged in the middle to late August.Before sowing,seed soaking and germination promotion treatments are carried out.Fertile and well-lit fieldsare selectedas seedling fields,with a seed rate of 22.5 to 27.0kg per hectare forthe female parent and 4to 8kg perhectare for the male parent.Water and fertilizer management in the seedling fields followsthe principlesof heavybase fertilizer,controlld nitrogen fertilizer,and properapplication of transplanting fertilizer.Inthefieldseed production,isolation isachieved through time(a25daydiference in heading time) and space (a physical distance of 100m ）methods to ensure that the basic seedlings of the female parent are no less than 3Oo OOO per hectare and those of the male parent are no less than 3O OoO per hectare. Scientific waterand fertilizer management isimplemented,withfertilizerapplicationdetermined bysoilfertility and strict control of urea application.Diseases,pests,and weeds such as rice blast,rice stem borer,and barnyard grass are mainly prevented,and drugs are alternated at critical periods (such as 30% chlorantraniliprole and 75% （20号 tricyclazole)to ensure seed production success.Flowering period prediction and adjustment are conducted 26 days before the heading period.Gibberellin GA 3 issprayed to create a favorable pollination environment for both parents,and artificial pollination is carriedouton the fourth day afterapplication.Harvesting is done around 28 days after application.After harvesting,the seeds are dried through natural sun-drying,horizontal drying,and tobacco curing rooms,and selected using aseed selection machine.This article provides areference for the further promotion and application of this sterile line.

Keywordshigh outcrossing rate; two-line; sterile line; Quan 211S; seed production technology

水稻是主要粮食作物之一。（剩余8675字）