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为充分挖掘野生稻的有利基因,改良恢复系,减少水稻的氮肥施用量,采用大田初筛和桶栽复筛相结合的方法,对88份协青早B//协青早B/东乡野生稻BC_1F_(13)株系和11份恢复系材料进行低氮耐性鉴定。大田初筛以单株有效穗数、结实率、生物产量、单株产量4个对氮素反应敏感指标的平均隶属函数值对供试材料进行评价,得出20份低氮耐性强,44份中间型和35份敏感型的材料。根据育种需要,从低氮耐性强和中间型材料中选取4份恢复系、6份协青早B//协青早B/东乡野生稻BC_1F_(13)株系材料进行桶栽,对其低氮耐性进行进一步鉴定。同样以上述4个指标为鉴定基础,根据平均隶属函数值筛选出5个强耐型材料(GP9、GP62、GP172、GP175、GP182)和1个敏感型材料(GP90)。
In order to fully exploit the favorable gene of wild rice, improve the restorer line and reduce the amount of nitrogen fertilizer in rice, we used 88 lines of Xieqingzao B // Xieqingzao B / Dongxiang Wild Rice BC_1F_ (13) lines and 11 restorer lines were identified for their low nitrogen tolerance. The results of field test showed that the average yield of nitrogen sensitive response index was 4 for effective nitrogen number per plant, seed setting rate, biomass yield and yield per plant. Intermediate and 35 sensitive materials. According to breeding needs, 4 restorer lines were selected from low nitrogen tolerance and intermediate materials, and 6 Xieqingzao B // Xieqingzao B / Dongxiang wild rice BC_1F_ (13) Nitrogen tolerance was further identified. Based on the above four indexes, five strong resistant materials (GP9, GP62, GP172, GP175, GP182) and one sensitive material (GP90) were screened based on the average membership function.