Variation in flowering abundance and its impact on the genetic diversity of the seed crop in a Norway spruce seed orchard
The variation in flowering abundance was studied in a Norway spruce seed orchard, located in southern Finland (62°13'N, 25°24'E), consisting of 67 clones from northern Finland (64°â67°N). The flowering variation in 1984â1996 was studied at the annual, clonal and graft level. In additio...
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ftdoajarticles:oai:doaj.org/article:fb6a36706fba419391b5310ffd79479b 2023-05-15T17:42:48+02:00 Variation in flowering abundance and its impact on the genetic diversity of the seed crop in a Norway spruce seed orchard Nikkanen, Teijo Ruotsalainen, Seppo 2000-01-01T00:00:00Z https://doi.org/10.14214/sf.626 https://doaj.org/article/fb6a36706fba419391b5310ffd79479b EN eng Finnish Society of Forest Science https://www.silvafennica.fi/article/626 https://doaj.org/toc/2242-4075 2242-4075 doi:10.14214/sf.626 https://doaj.org/article/fb6a36706fba419391b5310ffd79479b Silva Fennica, Vol 34, Iss 3 (2000) Forestry SD1-669.5 article 2000 ftdoajarticles https://doi.org/10.14214/sf.626 2022-12-31T04:38:14Z The variation in flowering abundance was studied in a Norway spruce seed orchard, located in southern Finland (62°13'N, 25°24'E), consisting of 67 clones from northern Finland (64°â67°N). The flowering variation in 1984â1996 was studied at the annual, clonal and graft level. In addition, the genetic diversity of an imaginary seed crop was estimated using a concept of status number. The between-year variation was large in both female and male flowering. Differences in flowering abundance among the clones were large and statistically significant in all the years studied. The average broad-sense heritability values for female and male flowering were 0.37 and 0.38, respectively, but varied considerably from year to year. The correlations between the flowering abundance of the clones in different years were usually positive and significant. However, the correlations for two pairs of successive good flowering years showed that the same clones usually flowered well in the first year in both pairs of years, and the other clones in the second year. The clonal differences in flowering could not be explained by geographic origin, but were more dependent on the graft size. Our results demonstrate that the variation in the ramet number, flowering abundance and pollen contamination must be included when estimating the genetic diversity of the seed crop in a seed orchard. The relative status number of the seed orchard was 84% of the number of clones when the variation in the ramet number was included. The relative status numbers after adjusting for the variation in female and male flowering were on the average 46 and 55%, respectively, and 59% when adjusting for both genders together. Pollen contamination increased the status number considerably. Article in Journal/Newspaper Northern Finland Directory of Open Access Journals: DOAJ Articles Norway Silva Fennica 34 3 |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Forestry SD1-669.5 |
spellingShingle |
Forestry SD1-669.5 Nikkanen, Teijo Ruotsalainen, Seppo Variation in flowering abundance and its impact on the genetic diversity of the seed crop in a Norway spruce seed orchard |
topic_facet |
Forestry SD1-669.5 |
description |
The variation in flowering abundance was studied in a Norway spruce seed orchard, located in southern Finland (62°13'N, 25°24'E), consisting of 67 clones from northern Finland (64°â67°N). The flowering variation in 1984â1996 was studied at the annual, clonal and graft level. In addition, the genetic diversity of an imaginary seed crop was estimated using a concept of status number. The between-year variation was large in both female and male flowering. Differences in flowering abundance among the clones were large and statistically significant in all the years studied. The average broad-sense heritability values for female and male flowering were 0.37 and 0.38, respectively, but varied considerably from year to year. The correlations between the flowering abundance of the clones in different years were usually positive and significant. However, the correlations for two pairs of successive good flowering years showed that the same clones usually flowered well in the first year in both pairs of years, and the other clones in the second year. The clonal differences in flowering could not be explained by geographic origin, but were more dependent on the graft size. Our results demonstrate that the variation in the ramet number, flowering abundance and pollen contamination must be included when estimating the genetic diversity of the seed crop in a seed orchard. The relative status number of the seed orchard was 84% of the number of clones when the variation in the ramet number was included. The relative status numbers after adjusting for the variation in female and male flowering were on the average 46 and 55%, respectively, and 59% when adjusting for both genders together. Pollen contamination increased the status number considerably. |
format |
Article in Journal/Newspaper |
author |
Nikkanen, Teijo Ruotsalainen, Seppo |
author_facet |
Nikkanen, Teijo Ruotsalainen, Seppo |
author_sort |
Nikkanen, Teijo |
title |
Variation in flowering abundance and its impact on the genetic diversity of the seed crop in a Norway spruce seed orchard |
title_short |
Variation in flowering abundance and its impact on the genetic diversity of the seed crop in a Norway spruce seed orchard |
title_full |
Variation in flowering abundance and its impact on the genetic diversity of the seed crop in a Norway spruce seed orchard |
title_fullStr |
Variation in flowering abundance and its impact on the genetic diversity of the seed crop in a Norway spruce seed orchard |
title_full_unstemmed |
Variation in flowering abundance and its impact on the genetic diversity of the seed crop in a Norway spruce seed orchard |
title_sort |
variation in flowering abundance and its impact on the genetic diversity of the seed crop in a norway spruce seed orchard |
publisher |
Finnish Society of Forest Science |
publishDate |
2000 |
url |
https://doi.org/10.14214/sf.626 https://doaj.org/article/fb6a36706fba419391b5310ffd79479b |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Northern Finland |
genre_facet |
Northern Finland |
op_source |
Silva Fennica, Vol 34, Iss 3 (2000) |
op_relation |
https://www.silvafennica.fi/article/626 https://doaj.org/toc/2242-4075 2242-4075 doi:10.14214/sf.626 https://doaj.org/article/fb6a36706fba419391b5310ffd79479b |
op_doi |
https://doi.org/10.14214/sf.626 |
container_title |
Silva Fennica |
container_volume |
34 |
container_issue |
3 |
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1766144714902339584 |