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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