ZINC finger proteins play an important role in the regulation of gene expression by binding to DNA/RNA in a sequence-specific manner. Now nearly 200 human zinc finger genes have been cloned. According to the differenc...ZINC finger proteins play an important role in the regulation of gene expression by binding to DNA/RNA in a sequence-specific manner. Now nearly 200 human zinc finger genes have been cloned. According to the difference of the conservative domain, the zinc finger proteins can be classified into several types.Most of zinc finger proteins belong to the C<sub>2</sub>H<sub>2</sub> type containing the consensus amino acid sequence YECX<sub>2</sub>CX<sub>3</sub>FX<sub>5</sub>LX<sub>2</sub>HX<sub>3</sub>HTGEKP, which is rather conservative especially in the link region between two zinc finger motifs （TGEKP）展开更多
Nearly half of the world population suffers from micronutrient malnutrition,particularly Zn deficiency.It is important to understand genetic variation for uptake and translocation behaviors of Zn in relevant crop spec...Nearly half of the world population suffers from micronutrient malnutrition,particularly Zn deficiency.It is important to understand genetic variation for uptake and translocation behaviors of Zn in relevant crop species to increase Zn concentration in edible parts.In the present study,genetic variation in grain Zn concentration of 319 finger millet genotypes was assessed.Large genetic variation was found among the genotypes,with concentrations ranging from 10 to 86 μg g^(-1)grain.Uptake and translocation studies with Zn/^(65) Zn application in 12 selected low-Zn genotypes showed wide variation in root uptake and shoot translocation,with genotypes GEC331 and GEC164 showing greater uptake and translocation.Genotypes GEC164 and GEC543 showed increased grain Zn concentration.Genotypes GEC331 and GEC164 also showed improved yield under Zn treatment.Appreciable variation in grain Zn concentration among finger millet genotypes found in this study offers opportunities to improve Zn nutrition through breeding.展开更多
文摘ZINC finger proteins play an important role in the regulation of gene expression by binding to DNA/RNA in a sequence-specific manner. Now nearly 200 human zinc finger genes have been cloned. According to the difference of the conservative domain, the zinc finger proteins can be classified into several types.Most of zinc finger proteins belong to the C<sub>2</sub>H<sub>2</sub> type containing the consensus amino acid sequence YECX<sub>2</sub>CX<sub>3</sub>FX<sub>5</sub>LX<sub>2</sub>HX<sub>3</sub>HTGEKP, which is rather conservative especially in the link region between two zinc finger motifs （TGEKP）
基金supported by projects from Department of Science and Technology(DST)(Grant#SR/SO/PS-14/2002)Department of Biotechnology(DBT)(Grant#BT/01/COE/05/03),New Delhi,Government of IndiaAll India Coordinated Research Project on millets(AICRP),GKVK,University of Agricultural Sciences,Bangalore,India for providing finger millet genotypes used in this study
文摘Nearly half of the world population suffers from micronutrient malnutrition,particularly Zn deficiency.It is important to understand genetic variation for uptake and translocation behaviors of Zn in relevant crop species to increase Zn concentration in edible parts.In the present study,genetic variation in grain Zn concentration of 319 finger millet genotypes was assessed.Large genetic variation was found among the genotypes,with concentrations ranging from 10 to 86 μg g^(-1)grain.Uptake and translocation studies with Zn/^(65) Zn application in 12 selected low-Zn genotypes showed wide variation in root uptake and shoot translocation,with genotypes GEC331 and GEC164 showing greater uptake and translocation.Genotypes GEC164 and GEC543 showed increased grain Zn concentration.Genotypes GEC331 and GEC164 also showed improved yield under Zn treatment.Appreciable variation in grain Zn concentration among finger millet genotypes found in this study offers opportunities to improve Zn nutrition through breeding.
