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  • 1
    Electronic Resource
    Electronic Resource
    Interval mapping of quantitative trait loci affecting NESTUR, a stem growth efficiency index of radiata pine seedlings (1998)
    Springer
    Theoretical and applied genetics 97 (1998), S. 1062-1068 
    Details
    ISSN: 1432-2242
    Keywords: Key words NESTUR ; Stem growth efficiency ; RAPD ; QTL ; Haploid megagametophyte
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  NESTUR (needle-to-stem unit rate) is a stem growth index of conifer seedlings that measures the efficiency of stemwood production per unit of needle growth, and is related to other seedling traits such as height, stem diameter, stem volume and needle volume. Quantitative trait loci (QTLs) affecting the expression of stem growth efficiency in radiata pine seedlings were investigated using a RAPD linkage map constructed from markers scored on haploid, megagametophytic DNA. Four putative QTLs were detected which accounted for 8.5–36.4% of the population variance. A search for evidence of epistasis, using both complete pairwise and conditional interactions, did not yield any statistically significant result. Over a 3-year period, seedlings with high-NESTUR marker alleles showed a superior growth performance of 17–40% for height, diameter and volume over those with low-NESTUR marker alleles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050992
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  • 2
    Electronic Resource
    Electronic Resource
    Linkage of RAPD markers to NESTUR, a stem growth index in radiata pine seedlings (1997)
    Springer
    Theoretical and applied genetics 95 (1997), S. 119-124 
    Details
    ISSN: 1432-2242
    Keywords: Key words Bulked segregant analysis ; Quantitative trait locus ; Epistasis ; Stem growth efficiency
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Needle-to-stem unit rate (NESTUR) is a stem growth index of conifer seedlings that measures the efficiency of stemwood production per unit of foliage growth. The random amplified polymorphic DNA (RAPD) technique was applied to haploid DNA from the megagametophytes of a full-sib radiata pine cross to find markers linked to factors controlling the NESTUR trait. Using the bulked segregant analysis approach, 23 of 933 primers displayed putative linkage to factors controlling NESTUR. Based on the genotypic analysis of 174 individuals, two quantitative trait loci (QTLs) controlling NESTUR were identified at ANOVA P-levels of 0.01–0.001. The QTLs were identified by RAPD markers OPE-06450 and OPA-101200, which were linked to each other (r=7%), and UBC-333550, which was not linked to the other two. Linkage to components of NESTUR (increments in stem diameter and stem volume) was demonstrated for UBC-333550, while the others were not linked to NESTUR components.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050539
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