首页|Effects of chromosome substitution on the utilization efficiency of nitrogen, phosphorus, and potassium in wheat
Effects of chromosome substitution on the utilization efficiency of nitrogen, phosphorus, and potassium in wheat
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NETL
NSTL
万方数据
A complete set of chromosome substitution lines with genetic background of Chinese Spring (CS) were used to determine the effects of each chromosome on utilization efficiencies of nitrogen,phosphorus,and potassium in wheat (Triticum aestivum L.).In each line,only one pair of chromosomes in CS genome was substituted by the corresponding one of donor Synthetic 6x.Under normal growth conditions supplied with enough inorganic nutrients,the dry mass per plant and the utilization efficiencies of nitrogen (N),phosphorus (P),and potassium (K) in plants varied largely among CS,Synthetic 6x,and the chromosome substitution lines (1A-7A,1B-7B,and 1D-7D).Of these,1A substituted by the chromosome 1A of Synthetic 6x (other fines are the same as 1A hereafter) had the highest plant dry mass and the accumulative amount of N and K,and 1B behaved to have the highest plant accumulative P amount.1D and 4D had the lowest accumulative P amount and plant dry mass,respectively.4B showed the lowest plant accumulative N and K.Thus,chromosome 1A of Synthetic 6x contains major genes endowing plant capacities of higher dry mass,accumulative N and K,whereas chromosome 1B of Synthetic 6x carries major genes improving plant accumulative P capacities.The lines,together with CS and the donor,could be classified into three groups including high-efficiency,mid-efficiency,and low-efficiency based on plant dry mass.Regression analysis suggested that there are significantly positive correlations between plant dry mass and the accumulated amount of N,P,and K.Further,there are positively significant correlations among the plant accumulative N amount and some plant traits and physiological parameters,as well as positively significant correlations between the accumulative amount of P and K and the photosynthetic rate (Pn).
NETL
NSTL
万方数据
