Molecular-marker analysis of quantitative traits for growth and development in juvenile apple trees

Publication Overview
TitleMolecular-marker analysis of quantitative traits for growth and development in juvenile apple trees
AuthorsConner PJ, Brown SK, Weeden NF
TypeJournal Article
Journal NameTheoretical and applied genetics
Volume96
Issue8
Year1998
Page(s)1027-1035
CitationConner PJ, Brown SK, Weeden NF. Molecular-marker analysis of quantitative traits for growth and development in juvenile apple trees. Theoretical and applied genetics. 1998; 96(8):1027-1035.

Abstract

Random amplified polymorphic DNAs (RAPDs) were used in combination with a double pseudo-testcross mapping strategy to estimate the position and effects of quantitative trait loci (QTLs) for traits influencing juvenile tree growth and development in two apple cultivars. The mapping population consisted of 172 F1 trees from a cross between the columnar mutant ‘Wijcik McIntosh’ and a standard form disease-resistant selection NY 75441-58. Significant associations were found between markers and height increment, internode number, internode length, base diameter increment, base diameter after 9 years of growth, branch number, and leaf break. The number of genomic regions associated with each trait varied from one to eight. The amount of variation explained by linear regression on individual marker loci (R2) ranged from 3.9 to 24.3%, with an average of 7%. Multiple regression using markers for each putative QTL explained from 6.6 to 41.6% of the phenotypic variation, with an average value of 24.3%. A large number of traits had significant variation associated with the map position of the dominant columnar gene, Co. QTL stability over years was estimated by comparing the locations of putative QTLs for traits measured in multiple years. The majority of genomic regions were associated with a trait in only a single year, although regions associated with a trait in more than 1 year were also detected. The limitations of dominant markers and an outbred mapping pedigree for QTL analysis are discussed.
Features
This publication contains information about 44 features:
Feature NameUniquenameType
branch numberqBN.WN-ch7QTL
branch numberqBN.WN-ch10QTL
bud breakqLFB.WN-ch3QTL
bud breakqLFB.WN-ch12QTL
bud breakqLFB.WN-ch9QTL
bud breakqLFB.WN-ch9.2QTL
bud breakqLFB.WN-ch11QTL
bud breakqLFB.WN-ch7QTL
bud breakqLFB.WN-ch15QTL
bud breakqLFB.WN-ch6QTL
base diameter incrementqBDI.WN-ch15QTL
base diameter incrementqBDI.WN-ch10QTL
plant height incrementqPHI.WN-ch12QTL
plant height incrementqPHI.WN-ch9QTL
plant height incrementqPHI.WN-ch12.2QTL
plant height incrementqPHI.WN-ch7QTL
plant height incrementqPHI.WN-ch6QTL
internode lengthqINL.WN-ch6QTL
internode lengthqINL.WN-ch10QTL
internode lengthqINL.WN-ch9QTL
internode numberqINNB.WN-ch12QTL
internode numberqINNB.WN-ch7QTL
internode numberqINNB.WN-ch21QTL
internode numberqINNB.WN-ch10QTL
internode numberqINNB.WN-ch1QTL

Pages

Featuremaps
This publication contains information about 1 maps:
Map Name
Apple-WN-F1