| dc.contributor.advisor | knowles, peggy | |
| dc.contributor.author | barrett, john | |
| dc.date.accessioned | 2017-06-05t19:24:13z | |
| dc.date.available | 2017-06-05t19:24:13z | |
| dc.date.created | 1985 | |
| dc.date.issued | 1985 | |
| dc.identifier.uri | http://knowledgecommons.lakeheadu.ca/handle/2453/1683 | |
| dc.description.abstract | multi-locus enzyme systems were studied in a black
spruce {picea maniana (mill.) b.s.p.) clonal seed orchard in
northwestern ontario. the embryonic and megagametophytic
tissues of each clone were sampled and electrophoretically
analysed to examine the inheritance pattern of 8 polymorphic
loci. with the exception of leucine aminopeptidase (lap) and
aconitase (aco), allozyme segregation followed expected 1:1
ratios. the mating system is characterized by a moderate
level of selfing (s=0.15) and a small effective population
size. the ratio of genetically effective males to receptive
females was calculated to be 0.31. although the parental
population was in hardy-weinberg equilibrium, the majority of the enzyme systems examined revealed a deviation from the
hardy-weinberg equilibrium in the filial generation. several
loci exhibited heterogeneous pollen pools and there was an
observed excess of heterozygotes. indications of non-random
mating and small effective population size invalidate two
basic seed orchard assumptions, namely, random mating and
large population size. | |
| dc.language.iso | en_us | |
| dc.subject | black spruce | |
| dc.subject | seed orchards ontario, northwestern | |
| dc.subject | cloning | |
| dc.title | mating system and population structure in a black spruce (picea mariana (mill.) b.s.p.) clonal seed orchard in northwestern ontario | |
| dc.type | thesis | |
| etd.degree.name | master of science | |
| etd.degree.level | master | |
| etd.degree.discipline | forestry and the forest environment | |
| etd.degree.grantor | 阿根廷vs墨西哥竞猜
| |
