EFFECTS OF COMPETITION ON THE FITNESS OF WILD AND CROP-WILD HYBRID SUNFLOWER FROM A DIVERSITY OF WILD POPULATIONS AND CROP LINES

Evolution ◽  
2006 ◽  
Vol 60 (10) ◽  
pp. 2044 ◽  
Author(s):  
Kristin L. Mercer ◽  
Donald L. Wyse ◽  
Ruth G. Shaw
Keyword(s):  
Wild Populations ◽  
Wild Hybrid ◽  
Hybrid Sunflower

scholarly journals Fitness of Crop-Wild Hybrid Sunflower under Competitive Conditions: Implications for Crop-to-Wild Introgression

PLoS ONE ◽  
2014 ◽  
Vol 9 (10) ◽  
pp. e109001 ◽  
Author(s):  
Kristin L. Mercer ◽  
D. Jason Emry ◽  
Allison A. Snow ◽  
Matthew A. Kost ◽  
Brian A. Pace ◽  
...  
Keyword(s):  
Wild Hybrid ◽  
Hybrid Sunflower

Maternal effects and embryo genetics: germination and dormancy of crop–wild sunflower hybrids

2013 ◽  
Vol 23 (4) ◽  
pp. 241-255 ◽  
Author(s):  
Alexa N. Weiss ◽  
Samantha B. Primer ◽  
Brian A. Pace ◽  
Kristin L. Mercer
Keyword(s):  
Maternal Effects ◽  
Laboratory Experiments ◽  
Life History Traits ◽  
Wild Plant ◽  
Agricultural Crops ◽  
Seed Traits ◽  
Wild Populations ◽  
Plant Populations ◽  
Seed Bank Dynamics ◽  
Wild Hybrid

AbstractGene flow between agricultural crops and related wild plant populations can produce hybrids which differ significantly from their wild counterparts in many life history traits, including seed traits. Seeds from wild annuals often possess significant dormancy, while cultivated varieties have been selected to germinate immediately under favourable conditions. Consequently, the dormancy characteristics of crop–wild hybrids could influence their survival, seed-bank dynamics and, ultimately, the extent to which crop genes persist in wild populations. Dormancy characteristics can be influenced by both maternal effects, as well as the genetics of a seed's embryo, which are the result of contributions from both parents. Here we focus on how maternal effects and embryo genetics affect seed dormancy in crop–wild hybrid sunflowers (Helianthus annuus). Using three laboratory experiments, we quantified the germination and dormancy of 15 crop–wild hybrid sunflower cross types, while also identifying achene characteristics that may influence the differential germination observed. We found that increased frequencies of crop alleles and the maternal effects imparted by hybridization can reduce dormancy, though the effect of increased frequencies of crop alleles was more pronounced in wild- and F1-produced than in the crop-produced achenes. The more open pericarp of the crop-produced achenes and the shorter relative distance that their radicles had to travel to germinate may explain some of the observed maternal effects. Finally, we generated hypotheses about how these results could affect survival and crop gene introgression in the field.

scholarly journals Seed fates in crop-wild hybrid sunflower: crop allele and maternal effects

2014 ◽  
Vol 8 (2) ◽  
pp. 121-132 ◽  
Author(s):  
Brian A. Pace ◽  
Helen M. Alexander ◽  
Jason D. Emry ◽  
Kristin L. Mercer
Keyword(s):  
Maternal Effects ◽  
Wild Hybrid ◽  
Sunflower Crop ◽  
Seed Fates ◽  
Hybrid Sunflower

Increased Germination Of Diverse Crop–Wild Hybrid Sunflower Seeds

2006 ◽  
Vol 16 (3) ◽  
pp. 845-854 ◽  
Author(s):  
Kristin L. Mercer ◽  
Ruth G. Shaw ◽  
Donald L. Wyse
Keyword(s):  
Sunflower Seeds ◽  
Wild Hybrid ◽  
Hybrid Sunflower

Comparative phytochemical study on the phenolic compounds content of Artemisia annua L. from wild populations in Republic of Moldova

Planta Medica ◽  
2016 ◽  
Vol 81 (S 01) ◽  
pp. S1-S381
Author(s):  
CP Stefanache ◽  
OC Bujor ◽  
R Necula ◽  
V Ghendov ◽  
A Trifan ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Artemisia Annua ◽  
Wild Populations ◽  
Phytochemical Study ◽  
Republic Of Moldova ◽  
Artemisia Annua L
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