The impact of extensive clonal growth on fine-scale mating patterns: a full paternity analysis of a lily-of-the-valley population (Convallaria majalis)

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The impact of extensive clonal growth on fine-scale mating patterns: a full paternity analysis of a lily-of-the-valley population (Convallaria majalis)

Katrien Vandepitte [et al.] - Nama Orang;

† Background and Aims:
The combination of clonality and a mating system promoting outcrossing is considered advantageous because outcrossing avoids the fitness costs of selfing within clones (geitonogamy) while clonality assures local persistence and increases floral display. The spatial spread of genetically identical plants (ramets)
may, however, also decrease paternal diversity (the number of sires fertilizing a given dam) and fertility, particularly towards the centre of large clumped clones. This study aimed to quantify the impact of extensive clonal growth on fine-scale paternity patterns in a population of the allogamous Convallaria majalis.

† Methods:
A full analysis of paternity was performed by genotyping all flowering individuals and all viable seeds
produced during a single season using AFLP. Mating patterns were examined and the spatial position of ramets
was related to the extent of multiple paternity, fruiting success and seed production.

† Key Results:
The overall outcrossing rate was high (91 %) and pollen flow into the population was considerable (27 %). Despite extensive clonal growth, multiple paternity was relatively common (the fraction of siblings
sharing the same father was 0.53 within ramets). The diversity of offspring collected from reproductive
ramets surrounded by genetically identical inflorescences was as high as among offspring collected from
ramets surrounded by distinct genets. There was no significant relationship between the similarity of the
pollen load received by two ramets and the distance between them. Neither the distance of ramets with
respect to distinct genets nor the distance to the genet centre significantly affected fruiting success or seed production.

†Conclusions:
Random mating and considerable pollen inflow most probably implied that pollen dispersal distances
were sufficiently high to mitigate local mate scarcity despite extensive clonal spread. The data provide
no evidence for the intrusion of clonal growth on fine-scale plant mating patterns.

Key words: Paternity analysis, mate diversity, outcrossing, mating opportunities, AFLP, reproductive success,
seed set, ramet, lily-of-the-valley, Convallaria majalis.

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Informasi Detail

Judul Seri: Annals of Botany
No. Panggil: -
Penerbit: Oxford : Oxford University Press on behalf of the Annals of Botany Company., 2013
Deskripsi Fisik: Annals of Botany 111: 623–628, 2013
Bahasa: English
ISBN/ISSN: -
Klasifikasi: -
Tipe Isi: -
Tipe Media: -
Tipe Pembawa: -
Edisi: 111: 2013
Subjek: EKOFISIOLOGI TANAMAN
Info Detail Spesifik: -
Pernyataan Tanggungjawab: agus

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The impact of extensive clonal growth on fine-scale mating patterns: a full paternity analysis of a lily-of-the-valley population (Convallaria majalis)

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