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先恢207是优良的水稻三系恢复系,以先恢207为父本配制的杂交水稻组合金优207和T优207等是长江中下游稻区的主栽晚籼组合。螟虫(包括稻纵卷叶螟、二化螟、三化螟)是中国南方水稻的主要害虫之一。以转cry1C*基因的T1C-19为抗螟虫基因供体,通过杂交、回交和分子标记辅助选择技术相结合的方法将螟虫抗性基因cry1C*转移到恢复系先恢207中,培育获得携有cry1C*基因的纯合株系2个,分别命名为华抗恢1431和华抗恢1432,并以金23A等6个不育系为父本配制了抗螟虫组合。经田间鉴定,改良的抗螟虫恢复系华抗恢1431和华抗恢1432以及杂交组合对稻纵卷叶螟的抗性达到100%。华抗恢1431的农艺性状、稻米品质和配合力等方面基本保持了先恢207的特性,以金23A作母本配制的杂交组合的生育期、产量和稻米品质均与金优207相当。选育出川23A/华抗恢1431、中9A/华抗恢1431 2个产量优于金优207、生育期和稻米品质与金优207相当的中熟晚籼抗螟虫组合。同时还选育出川农1A/华抗恢1431、金科1A/华抗恢1431 2个迟熟晚籼抗螟虫组合。
The first restorer 207 is an excellent three-line restorer line in rice. The hybrid rice combination Jinyou 207 and T You 207, which were planted in Xianhui 207 as the male parent, was the main late indica hybrid rice in the middle and lower reaches of the Yangtze River. Stem borers (including rice leaf roller, striped stem borer, rice stem borer) is one of the major pests of rice in southern China. To cry1C * gene T1C-19 as a stem borer gene donor, by crossing, backcrossing and molecular marker-assisted selection of the combination of the method to the stem borer resistance gene cry1C * transferred to the restorer Xianhui 207, obtained by carrying Two homozygous lines with cry1C * gene were named Huaqiangsui 1431 and Huaqiangsui 1432, respectively, and six insect-resistant lines, Jin 23A, were used as male parents to prepare a combination of stem borers. After field identification, the improved resistance to stem borer resisting lines Hua Kang Hui 1431 and Hua Kang Hui 1432 and the hybrid combination of rice leaf roller resistance reached 100%. Huaqiangsui3131 agronomic traits, rice quality and combining ability to maintain the characteristics of the first to restore 207, the gold 23A as the female parent of the hybrid combinations of the growth period, yield and quality of rice and Jinyou 207 is equivalent. Breeding Zhongchuan 23A / Huaqiangsui 1431, Zhong 9A / Hua Kangxiu 1431 2 yield is superior to Jinyou 207, maturity and rice quality and Jinyou 207 equivalent medium late indica rice stem borer combination. At the same time also bred a Chuannong 1A / Hua Kang Hui 1431, Jinke 1A / Huaqiang restore 1431 late late indica rice stem borer combination.