e-journal

Seed fates in crop–wild hybrid sunflower: crop allele and maternal effects

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Domestication has resulted in selection upon seed traits found in wild populations,yet crop-wild hybrids retain some aspects of both parental phenotypes. Seed fates of germination, dormancy, and mortality can influence the success of
crop allele introgression in crop-wild hybrid zones, especially if crop alleles or crop-imparted seed coverings result in out-of-season germination. We performed a seed burial experiment using crop, wild, and diverse hybrid sunflower (Helianthus annuus) cross types to test how a cross type’s maternal parent and nuclear genetic composition might affect its fate under field conditions. We observed higher maladaptive fall germination in the crop- and F1- produced seeds than wild-produced seeds and, due to an interaction with percent crop alleles, fall germination
was higher for cross types with more crop-like nuclear genetics. By spring, crop-produced cross types had the highest overwintering mortality, primarily due to higher fall germination. Early spring germination was identical
across maternal types, but germination continued for F1-produced seeds. In conclusion,the more wild-like the maternal parent or the less proportion of the cross type’s genome contributed by the crop, the greater likelihood a seed will remain ungerminated than die. Wild-like dormancy may facilitate introgression through future recruitment from the soil seed bank.

Keywords
dormancy, gene flow, hybridization,introgression, maternal effects, seed banks,sunflower.

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Ketersediaan

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Informasi Detail

Judul Seri

Evolutionary Applications

No. Panggil

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Penerbit

: The Authors., 2015

Deskripsi Fisik

Evolutionary Applications 8 (2015) 121–132

Bahasa

English

ISBN/ISSN

doi:10.1111/eva.1223

Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

Agriculture

Info Detail Spesifik

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Pernyataan Tanggungjawab

Wati/Agus

Versi lain/terkait

Lampiran Berkas

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