Potential genetic improvement due to supplemental mass pollination management in conifer seed orchards

Askew, G. R.

doi:10.1016/0378-1127(92)90271-a

Cited by 12 publications

(5 citation statements)

References 2 publications

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“…However, the present study indicates that significant deviation of the paternal contribution from the panmictic situation is apparently more problematic for the genetic quality in the seed orchard progeny than the pollen contamination and selfing. To solve this problem, artificial operations such as the promotion of flowering by using GAs (Bonnet-Masimbert 1987) and supplemental mass pollination (SMP) (Askew 1992) are required. Total 82 100.0 1) Seedlings which were self-pollinated by Tanabe-(t)54.…”

Section: Discussionmentioning

confidence: 99%

Identification of the Male Parents of Half-sib Progeny from Japanese Black Pine (Pinus thunbergii Parl.) Clonal Seed Orchard using RAPD Markers.

2002

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Random amplified polymorphic DNA (RAPD) markers were used to identify the male parents of the half-sib progeny from a single clone within a Japanese black pine (Pinus thunbergii Parl.) clonal seed orchard consisting of 16 pinewood-nematode [Bursaphelenchus xylophilus (Steiner et Buhrer) Nickle] resistant clones. Twenty-one primers, with 28 polymorphic and reproducible fragments, were selected from 320 primers examined. The genotypes of orchard clones at each fragment were fingerprinted by RAPD analyses of both diploid needles and haploid tissues of megagametophytes from each clone. We used all 28 RAPD markers to identify the male parents of the half-sib progeny of a single orchard clone, Tanabe-(t)54. By comparing the genotype of orchard clones with the phenotype in the seedling at each RAPD locus, we were able to identify the male parents of 82 out of 85 seedlings. Pollen contamination and natural selfing occurred at rates of only 2.4 % and 1.2 %, respectively. Mating with the clone deviated significantly from panmixia. More than half of the progeny of the clone were produced through fertilization by only two clones. Seven clones did not contribute at all to fertilization as the male parent. Deviations from panmixia have been caused by a difference in the distance between clones, variation in the amounts of pollen, and phenological synchrony between clones. The possibility and limitations of RAPD markers for paternity analysis in conifer seed orchards are discussed.

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Section: Discussionmentioning

confidence: 99%

Identification of the Male Parents of Half-sib Progeny from Japanese Black Pine (Pinus thunbergii Parl.) Clonal Seed Orchard using RAPD Markers.

2002

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“…In partial support of density‐dependent pollen limitation, plants of Aciphylla squarrosa —an iteroparous, dioecious, moderately long‐lived herb—were not pollen or resource limited (with respect to seed set) in a mast year, but reducing floral display caused lower seed set . As another line of partial support, supplemental pollination is widely used to increase seed yield in conifer seed orchards, and Smith et al . used qualitative observations of density‐dependent pollen limitation to parameterize theoretical models of density‐dependent pollen limitation in pines.…”

Section: Resource Budget Modelsmentioning

confidence: 99%

Resource depletion, pollen coupling, and the ecology of mast seeding

Crone

Rapp

2014

Annals of the New York Academy of Sciences

129

166

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Masting, the highly variable and synchronous production of seeds across a population of perennial plants, is an ecologically important, but still poorly understood, phenomenon. While much is known about the fitness benefits of masting and its effects on seed consumers and trophic interactions, less is understood about the proximate mechanisms of masting. The resource budget model (RBM) posits that masting requires more resources than plants can gain in a single year. Individual plants store resources until a threshold is reached and then produce seeds, which depletes resources so that plants cannot reproduce again for 2 or more years. Individuals are synchronized by pollen coupling or environmental forcing. We review the assumptions of these models and assess the extent to which they are consistent with general patterns in plant populations. We discuss the implications of the RBM for how plants respond to changes in the external environment. Overall, the RBM is a likely cause of synchrony in many, but not all, masting species. This mechanistic hypothesis also leads to specific, but not always intuitive, expectations about how plant resources affect mast seeding.

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“…The advantages of increasing or controlling pollen supply to open pollinated orchards have been well documented Trew 1981, Bridgwater et al 1993). Supplemental mass pollination has been used to improve genetic efficiency (El-Kassaby and Ritland 1986a, Askew 1992 and to reduce the effect of contaminating pollen (El-Kassaby and Ritland 1986b). However, where paternal analyses have been completed, the effectiveness of SMP has been generally low (Wheeler and Jech 1985, El-Kassaby et al 1993, Eriksson et al 1994, Webber 1995.…”

Section: Pollenmentioning

confidence: 99%

From flower induction to seed production in forest tree orchards

Bonnet-Masimbert¹,

Webber²

1995

Tree Physiology

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We review developments in cone and seed production research during the past decade. We conclude that although cone induction techniques, including hormonal and cultural procedures, have been refined, they still do not fully overcome juvenility or noninductive environmental effects. The role pollen plays in enhancing seed production and the genetic quality of seed is discussed. Techniques for handling pollen are described, in vitro viability assays are reviewed, and we also examine recent developments in pollen collection and its artificial ripening.

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Potential genetic improvement due to supplemental mass pollination management in conifer seed orchards

Cited by 12 publications

References 2 publications

Identification of the Male Parents of Half-sib Progeny from Japanese Black Pine (Pinus thunbergii Parl.) Clonal Seed Orchard using RAPD Markers.

Identification of the Male Parents of Half-sib Progeny from Japanese Black Pine (Pinus thunbergii Parl.) Clonal Seed Orchard using RAPD Markers.

Resource depletion, pollen coupling, and the ecology of mast seeding

From flower induction to seed production in forest tree orchards

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