Pollen contamination in a small black spruce seedling seed orchard for 3 consecutive years

Caron, G. E.; Leblanc, Ray

doi:10.1016/0378-1127(92)90045-b

Cited by 18 publications

(16 citation statements)

References 16 publications

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“…Picea omorika pollinates in the second week of May (Grbović and Isajev 1997). The periodic-ity and the variability in the abundance of flowering and pollen production have already been reported for P. omorika (Isajev 1987), as well as for P. mariana (Caron and Leblanc 1992). However, it had already been concluded that abundant flowering does not guarantee high germination of pollen (Grbović 1998).…”

Section: Introductionmentioning

confidence: 92%

“…) The normal pollination process and seed yield depend on pollen quality and quantity (Tucović and Isajev 1982;Runions et al 1999;Šijacić-Nikolić and Isajev 2001). The characteristics of male gametophytes are directly dependent on parental characteristics, but they are also affected by external factors deciding the flowering time and abundance, and pollen distribution and germination (Mergen et al 1965;Owens et al 1987;Caron and Leblanc 1992;Gómez-Casero et al 2004;Schueler et al 2005). Picea orientalis and P. sitchensis (Ho and Sziklai 1972;Runions et al 1999) release pollen in the second half of April and the first half of May.…”

Section: Introductionmentioning

confidence: 99%

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Variability of in vitro germination of Picea omorika pollen

Batos¹,

Nikolić²

2012

Dendrobiology

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Serbian spruce (Picea omorika /Panc./Purkyne) is a Balkan endemic and Tertiary relict, therefore it has an exceptional significance from the historical-geographical aspect as well as from the aspect of tree improvement and biodiversity conservation. Pollen was collected from 24 trees in two consecutive years and analyzed once a month. Germination of fresh pollen and pollen stored under different temperatures (room temperature: 23 ±1°C, +4°C, -15°C and -20°C) by in vitro method on a medium with 10% sucrose was analyzed. Fresh pollen germination was 53.63% and 68.06% for pollen collected in first and second year, respectively. After one year of storage at -20°C pollen germination was 22.36% and 60.72%, respectively. The differences between pollen collection years, temperature treatments, storage periods and individuals were statistically significant. Since pollen germination rates of individual trees between the first and the second year showed weak positive correlation, one could conclude that germination of fresh pollen grains is under the certain influence of environmental conditions. It is determined strong positive correlations between fresh and stored pollen at -20°C from both years of pollen collection.

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Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Variability of in vitro germination of Picea omorika pollen

Batos¹,

Nikolić²

2012

Dendrobiology

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“…This layer of jelly held pollen grains that impinged upon it. Further information about the trapping system is provided by Caron & LeBlanc (1992). Using lOOx magnification, eight adjacent fields (each of 1.50 mm2 in area) were systematically examined on each of the four cardinal directional faces of each trap, and the pollen catch on each counted.…”

Section: Pollen Trapping System and Pollen Identificationmentioning

confidence: 99%

“…The impaction trapping system described by Caron & LeBlanc (1992) was adopted for this study. This system was preferred to gene markers owing to the large number of half-sib families located in the orchard, and for the need to identify sources of pollen contamination and to evaluate differences in pollen numbers entering and exiting the orchard from different wind directions.…”

Section: (Aln~nniiscript Accepted 9 Hiarcli 1994)mentioning

confidence: 99%

Seasonal Variation in Pollen Catch in a Black Spruce Orchard

Caron

1994

Grana

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“…can also be planted to establish an isolation zone around the seed orchard. It may be worthwhile to apply pollen management strategies such as cone stimulation (for example, use of gibberellins to increase reproductive output), use of controlled pollination whenever possible, and supplemental mass pollination to increase the genetic quality of the seeds produced (Caron and Leblanc, 1992;Kaya et al, 2006;Stoehr et al, 2006;Fernandes et al, 2008).…”

Section: Discussionmentioning

confidence: 99%

Chloroplast DNA variation and pollen contamination in a Pinus brutia Ten. clonal seed orchard: implication for progeny performance in plantations

Bilgen¹,

Kaya²

2014

Turk J Agric For

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Pollen contamination is one of the important factors affecting the yield, adaptability, and genetic quality of the seed produced from seed orchards in forest tree breeding programs. Incoming pollen from the forests surrounding the seed orchard is a major concern in tree breeding because it contributes to losses in the expected genetic gains from seed orchard crops. The genetic variation and the level of pollen contamination in a 16-year-old Pinus brutia Ten. first-generation clonal seed orchard was studied using chloroplast microsatellite markers (cpSSRs). In total, 23 alleles and 36 unique allelic combinations (haplotypes) were detected based on the 6 cpSSR loci analyzed. The haplotypic diversity of the clones in the seed orchard was found to be 0.849. Out of 300 embryos analyzed, 87 were not compatible with any male parent within the seed orchard. Thus, 29% of the embryos were sired by pollen sources outside the orchard (i.e. apparent contamination). Microsatellite-based analysis revealed that the estimated contamination rate was 39.3%. Background pollination at this level will cause losses of 20% in the expected genetic gains. Our findings are valuable for the assessment of the intended seed orchard function, i.e. provision of genetically improved seed. It may be worthwhile to use pollen management strategies like strobilus stimulation, controlled pollination, and supplemental mass pollination to decrease pollen contamination and increase the genetic quality of the seeds produced.

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Pollen contamination in a small black spruce seedling seed orchard for 3 consecutive years

Cited by 18 publications

References 16 publications

Variability of in vitro germination of Picea omorika pollen

Variability of in vitro germination of Picea omorika pollen

Seasonal Variation in Pollen Catch in a Black Spruce Orchard

Chloroplast DNA variation and pollen contamination in a Pinus brutia Ten. clonal seed orchard: implication for progeny performance in plantations

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