HIGH THROUGHPUT SCREENING OF MUTAGENIZED POPULATIONS
First Claim
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1. A method for the detection of a mutation in a target sequence in a member of a mutagenized population, comprising the steps of:
- (a) isolating genomic DNA of each member of the mutagenized population to provide DNA samples of each population member;
(b) pooling the DNA obtained in step (a);
(c) amplifying the target sequence with a pair of (optionally labeled) primers from the DNA pools;
(d) pooling the amplification products of step (c) to create a library of amplification products;
(e) optionally, fragmenting the amplification products in the library;
(f) determining the nucleotide sequence of the amplified products or fragments using high throughput sequencing;
(g) identifying mutations by clustering/aligning the sequences of the fragments;
(h) screening the identified mutations for a modified function of the target sequence;
(i) designing a primer directed to hybridize to the identified mutation;
(j) amplifying the library of step (d) with the primer of step (i) and one of the primers of step (c);
(k) identify the population member(s) carrying the mutation;
(l) optionally, confirming the mutation by amplifying the target sequence from the member(s) of step (k) using the primers of step (c) and determining the sequence of the amplified product.
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Abstract
Efficient methods are disclosed for the high throughput identification of mutations in genes in members of mutagenized populations. The methods comprise DNA isolation, pooling, amplification, creation of libraries, high throughput sequencing of libraries, preferably by sequencing-by-synthesis technologies, identification of mutations and identification of the member of the population carrying the mutation and identification of the mutation.
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Citations
17 Claims
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1. A method for the detection of a mutation in a target sequence in a member of a mutagenized population, comprising the steps of:
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(a) isolating genomic DNA of each member of the mutagenized population to provide DNA samples of each population member; (b) pooling the DNA obtained in step (a); (c) amplifying the target sequence with a pair of (optionally labeled) primers from the DNA pools; (d) pooling the amplification products of step (c) to create a library of amplification products; (e) optionally, fragmenting the amplification products in the library; (f) determining the nucleotide sequence of the amplified products or fragments using high throughput sequencing; (g) identifying mutations by clustering/aligning the sequences of the fragments; (h) screening the identified mutations for a modified function of the target sequence; (i) designing a primer directed to hybridize to the identified mutation; (j) amplifying the library of step (d) with the primer of step (i) and one of the primers of step (c); (k) identify the population member(s) carrying the mutation; (l) optionally, confirming the mutation by amplifying the target sequence from the member(s) of step (k) using the primers of step (c) and determining the sequence of the amplified product. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11)
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2. A method for the detection of a mutation in a target sequence in a member of a mutagenized population, comprising the steps of:
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(a) isolating genomic DNA of each member of the mutagenized population to provide for DNA samples of each population member; (b) pooling the DNA obtained in step (a); (c) amplifying part of the target sequence with a pair of tagged (optionally labeled) primers from the DNA pools, wherein at least one of the primers preferably comprises a gene-specific section, a tag and a sequence primer binding site; (d) pooling the amplification products of step (c) to create a library of amplification products; (e) determining the nucleotide sequence of the amplification products using high throughput sequencing; (f) identifying mutations by clustering/aligning the sequences of the fragments; (g) identifying the member(s) having the mutation using the tags; (h) optionally, confirming the mutation by amplifying the target sequence from the member(s) of step (g) using the primers of step (c) and determining the sequence of the amplified product. - View Dependent Claims (12, 13, 14)
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- 15. Kit comprising one or more (labeled) primers for a particular gene or trait.
Specification