[Objective]The aim was to study the effect of herbicide on the growth of early seedlings of rye(Secale cereale).[Method]Effect of two kinds of herbicide(Atrazine and APM)on seedling growth of rye was investigated ...[Objective]The aim was to study the effect of herbicide on the growth of early seedlings of rye(Secale cereale).[Method]Effect of two kinds of herbicide(Atrazine and APM)on seedling growth of rye was investigated at the physiological,biochemical and cellular level.[Result]The Atrazin significantly decreased the contents of chlorophyll a,b and soluble proteins.Rye seeds were treated with 0.01-1 mg/L Atrazine for 16 h,the contents of chlorophyll a and b decreased from 1.26(a),0.49(b)mg/g FW(control)to 1.15(a),0.46(b)mg/g FW(0.1 mg/L)and 0.81(a),0.33(b)mg/g FW(1.0 mg/L).The content of soluble protein decreased with the increasing concentration of Atrazin.Atrazin had no significant influence on the cell division and chromosome structure variation.The contents of chlorophyll a,b and soluble proteins had no significantly change under the treatment of APM,but the number of chromosome structure variation such as chromosome bridge,multipolar division cells,lagging chromosome and unequal division cells increased significantly.[Conclusion]The critical concentration of Atrazine was 0.1-1.0 mg/L and 4 mg/L of APM in rye.展开更多
Rye(Secale cereale L.)has been widely used to improve wheat(Triticum aestivum L.)cultivars.Oligo probes combined with non-denaturing fluorescence in situ hybridization(ND-FISH)technology provide a convenient and effic...Rye(Secale cereale L.)has been widely used to improve wheat(Triticum aestivum L.)cultivars.Oligo probes combined with non-denaturing fluorescence in situ hybridization(ND-FISH)technology provide a convenient and efficient way to identify individual rye chromosomes.However,suitable ND-FISH-positive oligo probes for recognizing specific segments of rye chromosomes are lacking.Five new ND-FISH-positive oligo probes:Oligo-5BL.46,Oligo-5A8080,Oligo-5A8080.1,Oligo-1AL.73,and Oligo-0R3,combined with two previously reported oligo probes,Oligo-44 and Oligo-45,were used in this study.Probes Oligo-5BL.46,Oligo-5A8080 and Oligo-44 produced signals only in intercalary regions of arms 1RS,5RS,and 5RL,respectively.Probe Oligo-5A8080.1 combined with probe Oligo-45 distinguished the intercalary regions of arms 1RS,5RS,and 6RS simultaneously.Oligo-5A8080 and Oligo-5A8080.1 revealed variation in the distribution of 5S rDNA sequences and polymorphism among 5R chromosomes.Probe Oligo-1AL.73 produced signals only on chromosomes 4R and 7R and contributed to the construction of an improved FISH map of chromosome 4RKu and to the confirmation of 4RLKu breakpoints in wheat-rye 4RLKu translocation chromosomes.Oligo-0R3 produced signals in the telomeric and subtelomeric regions of 14 rye chromosomes.These oligo probes also revealed five new tandem repeats in rye.Using the oligo probes reported in this study,the short arms of 1R,5R,and 6R and the long arms of 4R and 7R can be easily discriminated when these chromosomes are broken.展开更多
Powdery mildew,caused by Blumeria graminis f.sp.tritici(Bgt),is a devastating disease that seriously threatens wheat yield and quality.To control this disease,host resistance is the most effective measure.Compared wit...Powdery mildew,caused by Blumeria graminis f.sp.tritici(Bgt),is a devastating disease that seriously threatens wheat yield and quality.To control this disease,host resistance is the most effective measure.Compared with the resistance genes from common wheat,alien resistance genes can better withstand infection of this highly variable pathogen.Development of elite alien germplasm resources with powdery mildew resistance and other key breeding traits is an attractive strategy in wheat breeding.In this study,three wheat-rye germplasm lines YT4-1,YT4-2,and YT4-3 were developed through hybridization between octoploid triticale and common wheat,out of which the lines YT4-1 and YT4-2 conferred adult-plant resistance(APR)to powdery mildew while the line YT4-3 was susceptible to powdery mildew during all of its growth stages.Using genomic in situ hybridization,multi-color fluorescence in situ hybridization,multi-color GISH,and molecular marker analysis,YT4-1,YT4-2,and YT4-3 were shown to be cytogenetically stable wheat-rye 6R addition and T1RS.1BL translocation line,6RL ditelosomic addition and T1RS.1BL translocation line,and T1RS.1BL translocation line,respectively.Compared with previously reported wheat-rye derivative lines carrying chromosome 6R,YT4-1 and YT4-2 showed stable APR without undesirable pleiotropic effects on agronomic traits.Therefore,these novel wheat-rye 6R derivative lines are expected to be promising bridge resources in wheat disease breeding.展开更多
基金Supported by Key Project for Science Researches of Ministry of Education(02010)~~
文摘[Objective]The aim was to study the effect of herbicide on the growth of early seedlings of rye(Secale cereale).[Method]Effect of two kinds of herbicide(Atrazine and APM)on seedling growth of rye was investigated at the physiological,biochemical and cellular level.[Result]The Atrazin significantly decreased the contents of chlorophyll a,b and soluble proteins.Rye seeds were treated with 0.01-1 mg/L Atrazine for 16 h,the contents of chlorophyll a and b decreased from 1.26(a),0.49(b)mg/g FW(control)to 1.15(a),0.46(b)mg/g FW(0.1 mg/L)and 0.81(a),0.33(b)mg/g FW(1.0 mg/L).The content of soluble protein decreased with the increasing concentration of Atrazin.Atrazin had no significant influence on the cell division and chromosome structure variation.The contents of chlorophyll a,b and soluble proteins had no significantly change under the treatment of APM,but the number of chromosome structure variation such as chromosome bridge,multipolar division cells,lagging chromosome and unequal division cells increased significantly.[Conclusion]The critical concentration of Atrazine was 0.1-1.0 mg/L and 4 mg/L of APM in rye.
基金the National Key Research and Development Program of China(2016YFD0102001)the National Natural Science Foundation of China(31770373).
文摘Rye(Secale cereale L.)has been widely used to improve wheat(Triticum aestivum L.)cultivars.Oligo probes combined with non-denaturing fluorescence in situ hybridization(ND-FISH)technology provide a convenient and efficient way to identify individual rye chromosomes.However,suitable ND-FISH-positive oligo probes for recognizing specific segments of rye chromosomes are lacking.Five new ND-FISH-positive oligo probes:Oligo-5BL.46,Oligo-5A8080,Oligo-5A8080.1,Oligo-1AL.73,and Oligo-0R3,combined with two previously reported oligo probes,Oligo-44 and Oligo-45,were used in this study.Probes Oligo-5BL.46,Oligo-5A8080 and Oligo-44 produced signals only in intercalary regions of arms 1RS,5RS,and 5RL,respectively.Probe Oligo-5A8080.1 combined with probe Oligo-45 distinguished the intercalary regions of arms 1RS,5RS,and 6RS simultaneously.Oligo-5A8080 and Oligo-5A8080.1 revealed variation in the distribution of 5S rDNA sequences and polymorphism among 5R chromosomes.Probe Oligo-1AL.73 produced signals only on chromosomes 4R and 7R and contributed to the construction of an improved FISH map of chromosome 4RKu and to the confirmation of 4RLKu breakpoints in wheat-rye 4RLKu translocation chromosomes.Oligo-0R3 produced signals in the telomeric and subtelomeric regions of 14 rye chromosomes.These oligo probes also revealed five new tandem repeats in rye.Using the oligo probes reported in this study,the short arms of 1R,5R,and 6R and the long arms of 4R and 7R can be easily discriminated when these chromosomes are broken.
基金This research was supported by the National Key Research and Development Program of China(2021YFD1200600)the National Natural Science Foundation of China(32272105).
文摘Powdery mildew,caused by Blumeria graminis f.sp.tritici(Bgt),is a devastating disease that seriously threatens wheat yield and quality.To control this disease,host resistance is the most effective measure.Compared with the resistance genes from common wheat,alien resistance genes can better withstand infection of this highly variable pathogen.Development of elite alien germplasm resources with powdery mildew resistance and other key breeding traits is an attractive strategy in wheat breeding.In this study,three wheat-rye germplasm lines YT4-1,YT4-2,and YT4-3 were developed through hybridization between octoploid triticale and common wheat,out of which the lines YT4-1 and YT4-2 conferred adult-plant resistance(APR)to powdery mildew while the line YT4-3 was susceptible to powdery mildew during all of its growth stages.Using genomic in situ hybridization,multi-color fluorescence in situ hybridization,multi-color GISH,and molecular marker analysis,YT4-1,YT4-2,and YT4-3 were shown to be cytogenetically stable wheat-rye 6R addition and T1RS.1BL translocation line,6RL ditelosomic addition and T1RS.1BL translocation line,and T1RS.1BL translocation line,respectively.Compared with previously reported wheat-rye derivative lines carrying chromosome 6R,YT4-1 and YT4-2 showed stable APR without undesirable pleiotropic effects on agronomic traits.Therefore,these novel wheat-rye 6R derivative lines are expected to be promising bridge resources in wheat disease breeding.