Pollen competition and seed-siring success in Picea abies

Aronen, Tuija; Nikkanen, Teijo; Harju, Anni; Tiimonen, H.; Häggman, Hely

doi:10.1007/s00122-001-0789-9

Cited by 37 publications

(34 citation statements)

References 21 publications

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“…We consistently found non-random patterns of siring among donors in mixed pollinations. Differential success of pollen donors in mixed-donor pollinations has been demonstrated in a variety of species and contexts (Snow and Spira 1991;Bertin 1986;Aronen et al 2002;Husband et al 2002). However, there was no positive correlation between the siring success of donors in mixture and in single-donor pollinations on any of the recipient genotypes.…”

Section: Discussionmentioning

confidence: 94%

The effects of pollen diversity on plant reproduction: insights from apple

Kron

Husband

2006

Sex Plant Reprod

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For many plants, the number of pollen genotypes deposited on a flower's stigma is positively related to fruit maturation and seed number; however, the mechanisms underlying this effect are less understood.Here we examined whether diversity of pollen (1, 3, or 5 donors) affects reproductive success in self-incompatible apple (Malus · domestica). Using paternity analysis, we then assessed the siring rate of individual donors to test whether diversity effects are related to the presence of a superior pollen donor or to donor · donor interactions. Increasing the diversity of compatible pollen enhanced seed number and reduced seed abortion in some but not all recipient genotypes. This effect was associated with an increased number of sires per fruit and non-random siring success among pollen donors. Two donors had consistently high siring rates, regardless of recipient genotype; however, the siring success of pollen donors was not correlated with their siring success in singledonor pollinations. Rather, siring success was affected by the identity of other pollen genotypes present on the stigma. Our results therefore suggest that the effects of pollen diversity are variable but may enhance fecundity by fostering interactions between pollen donors.

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Section: Discussionmentioning

confidence: 94%

The effects of pollen diversity on plant reproduction: insights from apple

Kron

Husband

2006

Sex Plant Reprod

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“…In this study, the substantial male reproductive success of clone 53 was mainly due to its high contribution to seed production in clone 6 (accounting for about 64 % of its total fertilizations). The floral synchrony period between these clones is not very long, so other factors such as pollen competition may also influence male reproductive success (STOEHR et al, 1999;NIKKANEN et al, 2000;ARONEN et al, 2002). Further study is required to assess this possibility.…”

Section: Relationships Between Male Reproductive Success and Biologicmentioning

confidence: 99%

Factors Influencing Male Reproductive Success in a Cryptomeria japonica Seed Orchard Revealed by Microsatellite Marker Analysis

et al. 2007

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We investigated the influence of male flower production, floral synchrony and inter-tree distances on male reproductive success in a miniature seed orchard of Cryptomeria japonica. We used six microsatellite markers to determine the paternity of each seed. In the seed orchard, the average pollen contamination and clonal self-fertilization rates were 38.7 % and 1.7 %, respectively. The level of male reproductive success of constituent clones varied from 0.0 to 15.7 %. Five clones showing the highest male reproductive success contributed ca. 30 % of all analyzed seeds as a pollen donor after excluding contamination by external sources of pollen. The statistical analyses showed that male reproductive success was strongly influenced by male flower production of each clone and, possibly, by their distance to the mother trees. The linear regression which included male flower production and floral synchrony as independent variables, however, accounted for only 14.7 % of variation of male reproductive success, suggesting that other factors such as pollen competition might also influence male reproductive success. Since we found no significant correlation between male reproductive and female reproductive successes, it may be better to equalize male and female reproductive successes independently.

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“…Post-pollination, pre-fertilization mating success reflects factors such as pollen germination rate (Niesesbaum and Schueller 1997;Nikkanen et al 2000;Aronen et al 2002) or PTGR (Snow and Spira 1991;Johnston 1993;Carney et al 1994;Emms et al 1996). These differences in rates represent potential reproduction barriers.…”

Section: Introductionmentioning

confidence: 97%

Post-pollination hybridization barriers in Nicotiana section Alatae

et al. 2008

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Nicotiana section Alatae contains eight species with variable flower sizes and morphologies. Section members readily hybridize in the glasshouse, but no hybrids have been observed in natural sympatric and parapatric populations. To investigate interspecific crossing relationships with respect to mechanisms preventing hybridization, all members of section Alatae were intercrossed in a complete diallel. We found positive correlation between the pistil length of the pollen donor and interspecific seed set relative to the conspecific cross. Pollen tube growth rate and pollen donor pistil length were positively correlated as well. Furthermore, pollen from short-pistil members of section Alatae could only grow a maximum distance proportional to, but greater than, their own pistil lengths. Our results show that pollen tube growth capacity (i.e., rate and distance), provides a hybridization barrier in long-pistil species 9 short-pistil species crosses. We also found another hybridization barrier not specifically related to pollen tube growth capacity in short-pistil species 9 long-pistil species. Taken together, these barriers can generally be described by a 'pistil-length mismatch' rule; in section Alatae, pollen has the most success fertilizing ovules from species with pistil lengths similar to their own. This rule could contribute to hybridization barriers in Section Alatae because the species display dramatically different pistil lengths.

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Pollen competition and seed-siring success in Picea abies

Cited by 37 publications

References 21 publications

The effects of pollen diversity on plant reproduction: insights from apple

The effects of pollen diversity on plant reproduction: insights from apple

Factors Influencing Male Reproductive Success in a Cryptomeria japonica Seed Orchard Revealed by Microsatellite Marker Analysis

Post-pollination hybridization barriers in Nicotiana section Alatae

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