A strategy based upon AFLP markers for high-efficiency mapping of morphological mutations and DNA probes to linkage groups in barley is presented. First, 511 AFLP markers were placed on the linkage map derived from the cross Proctor X Nudinka. Second, loci controlling phenotypic traits were assigned to linkage groups by AFLP analysis, using F2 populations consisting of 30-50 mutant planes derived from crosses of the type 'mutant X Proctor' and 'mutant X Nudinka.' To map DNA probes, 67 different wildtype barley lines were selected to generate F2 populations by crossing with Proctor and Nudinka. F2 plants that were polymorphic for a given RFLP fragment were classified into genotypic classes. Linkage of the RFLP polymorphism to 1 of the 511 AFLP loci was indicated by cosegregation. The use of the strategy is exemplified by the mapping of the mutation branched-5 to chromosome 2 and of the DNA probes Bkn2 and BM-7 to chromosomes 5 and 1, respectively. Map expansion and marker order in map regions with dense clustering of markers represented a particular problem. A discussion considering the effect of noncanonical recombinant products on these two parameters is provided.
An AFLP-based procedure for the efficient mapping of mutations and DNA probes in barley / P. Castiglioni, C. Pozzi, M. Heun, V. Terzi, K.J. Muller, W. Rohde, F. Salamini. - In: GENETICS. - ISSN 0016-6731. - 149:4(1998 Aug), pp. 2039-2056.
An AFLP-based procedure for the efficient mapping of mutations and DNA probes in barley
C. PozziSecondo
;V. Terzi;F. Salamini
Ultimo
1998
Abstract
A strategy based upon AFLP markers for high-efficiency mapping of morphological mutations and DNA probes to linkage groups in barley is presented. First, 511 AFLP markers were placed on the linkage map derived from the cross Proctor X Nudinka. Second, loci controlling phenotypic traits were assigned to linkage groups by AFLP analysis, using F2 populations consisting of 30-50 mutant planes derived from crosses of the type 'mutant X Proctor' and 'mutant X Nudinka.' To map DNA probes, 67 different wildtype barley lines were selected to generate F2 populations by crossing with Proctor and Nudinka. F2 plants that were polymorphic for a given RFLP fragment were classified into genotypic classes. Linkage of the RFLP polymorphism to 1 of the 511 AFLP loci was indicated by cosegregation. The use of the strategy is exemplified by the mapping of the mutation branched-5 to chromosome 2 and of the DNA probes Bkn2 and BM-7 to chromosomes 5 and 1, respectively. Map expansion and marker order in map regions with dense clustering of markers represented a particular problem. A discussion considering the effect of noncanonical recombinant products on these two parameters is provided.File | Dimensione | Formato | |
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