论文部分内容阅读
为了探讨光合作用及相关生理性状的遗传规律,利用由籼稻品种IR24和粳稻品种Asominori杂交衍生的65个染色体片段置换系(Chromosome Segment Substitution Lines,CSSLs)为材料,研究了水稻光合作用及相关生理性状的QTL。在水稻抽穗后7 d测定叶片光合速率(Pn)、蒸腾速率(Gs)、气孔导度(Tr)、细胞间隙CO2浓度(Ci)、叶绿素含量(CHL)、全氮含量(TLN)。共检测到10个QTLs,分布于第1、3、4、5、7、8和10染色体上,LOD值在2.77~8.42之间,贡献率为9.5%~46.5%。其中仅有控制气孔导度的qGs-8与控制叶绿素含量的qCHL-8以及第10染色体上控制气孔导度的qGs-10与控制细胞间隙CO2浓度的qCi-10位置相同,分别位于第8染色体上标记R727和第10染色体上标记C1166附近。其他QTL在染色体上的位置不同,暗示了水稻光合功能遗传规律的复杂性。
In order to investigate the genetic rules of photosynthesis and related physiological traits, we used 65 Chromosome Segment Substitution Lines (CSSLs) derived from indica rice variety IR24 and japonica rice variety Asominori to study the photosynthesis and its related physiological traits in rice Of QTLs. The photosynthetic rate (Pn), transpiration rate (Gs), stomatal conductance (Tr), intercellular CO2 concentration (Ci), chlorophyll content (CHL) and total nitrogen content (TLN) were measured at 7 days after heading. A total of 10 QTLs were detected on chromosomes 1, 3, 4, 5, 7, 8 and 10. The LOD values ranged from 2.77 to 8.42 with a contribution rate of 9.5% to 46.5%. Among them, only qGs-8, which controls stomatal conductance, qCHL-8, which controls chlorophyll content, and qGs-10, which controls stomatal conductance on chromosome 10, are located at the same position as qCi-10, which controls intercellular CO2 concentration, On marker R727 and on marker 10 near C1166. The location of other QTLs on the chromosomes suggests the complexity of the genetic law of photosynthetic function in rice.