A method of selecting and amplifying polynucleotides on a solid support, comprising: a) providing a plurality of amplification oligonucleotides immobilized on a solid support; b) hybridizing a population of oligonucleotide probes to a subset of said amplification oligonucleotides, each of said oligonucleotide probes comprising a first portion which is complementary to the amplification oligonucleotides and a second portion which comprises sequence from a selected region of a template polynucleotide; c) performing an extension reaction to extend hybridised amplification oligonucleotides to produce a population of support-bound capture oligonucleotides, each capture oligonucleotide in said population comprising a sequence that is complementary to a selected region of a template polynucleotide, thereby providing a solid support comprising the population of support-bound capture oligonucleotides, and a population of unextended amplification oligonucleotides; d) applying a population of template polynucleotides to the solid support under conditions such that the template polynucleotides selectively hybridise to the support-bound capture oligonucleotides, wherein the template polynucleotides comprise an adapter sequence at the 5' end, wherein the adapter sequence is the same as the sequence of the unextended amplification oligonucleotides; e) extending the support-bound capture oligonucleotides that are hybridized to the template polynucleotides, thereby generating extension products, the extension products having a portion complementary to the template polynucleotides and a portion complementary to the unextended amplification oligonucleotides; and f) amplifying the extension products, wherein the amplifying comprises annealing one or more of the unextended amplification oligonucleotides to one or more of the extension products, thereby producing a solid-phase amplification product. a) providing a plurality of amplification oligonucleotides immobilized on a solid support; b) hybridizing a population of oligonucleotide probes to a subset of said amplification oligonucleotides, each of said oligonucleotide probes comprising a first portion which is complementary to the amplification oligonucleotides and a second portion which comprises sequence from a selected region of a template polynucleotide; c) performing an extension reaction to extend hybridised amplification oligonucleotides to produce a population of support-bound capture oligonucleotides, each capture oligonucleotide in said population comprising a sequence that is complementary to a selected region of a template polynucleotide, thereby providing a solid support comprising the population of support-bound capture oligonucleotides, and a population of unextended amplification oligonucleotides; d) applying a population of template polynucleotides to the solid support under conditions such that the template polynucleotides selectively hybridise to the support-bound capture oligonucleotides, wherein the template polynucleotides comprise an adapter sequence at the 5' end, wherein the adapter sequence is the same as the sequence of the unextended amplification oligonucleotides; e) extending the support-bound capture oligonucleotides that are hybridized to the template polynucleotides, thereby generating extension products, the extension products having a portion complementary to the template polynucleotides and a portion complementary to the unextended amplification oligonucleotides; and f) amplifying the extension products, wherein the amplifying comprises annealing one or more of the unextended amplification oligonucleotides to one or more of the extension products, thereby producing a solid-phase amplification product.