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Genetic architecture of plant height in maize phenotype‐selected introgression families
Author(s) -
AbdelGhani Adel H.,
Hu Songlin,
Chen Yongsheng,
Brenner Everton A.,
Kumar Bharath,
Blanco Michael,
Lübberstedt Thomas
Publication year - 2016
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/pbr.12387
Subject(s) - introgression , biology , germplasm , backcrossing , genetics , allele , genome , single nucleotide polymorphism , genotyping , inbred strain , gene , genotype , botany
This study aimed at developing, characterizing and evaluating two maize phenotypic‐selected introgression libraries for a collection of dominant plant height ( PHT )‐increasing alleles by introgressing donor chromosome segments ( DCS ) from Germplasm Enhancement of Maize ( GEM ) accessions into elite inbred lines: PHB 47 and PHZ 51. Different backcross generations ( BC 1 ‐ BC 4 ) were developed and the tallest 23 phenotype‐selected introgression families ( PIF s) from each introgression library ( PHB 47 or PHZ 51) were selected for single nucleotide polymorphism genotyping to localize DCS underlying PHT. The result shows that most PIF s carrying DCS were significantly ( α = 0.01) taller than the respective recurrent parent. In addition, they contained larger donor genome proportions than expected in the absence of selection or random mating across all BC generations. The DCS were distributed over the whole genome, indicating a complex genetic nature underlying PHT . We conclude that our PIF s are enriched for favourable PHT ‐increasing alleles. These two libraries offer opportunities for future PHT gene isolation and allele characterization and for breeding purposes, such as novel cultivars for biofuel production.