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A QTL associated with leaf trichome traits has a major influence on the abundance of the predatory mite Typhlodromus pyri in a hybrid grapevine population

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Horticulture Research 2019年第1期6卷 639-650页

作者： paola barba Rebecca Loughner Karen Wentworth Jan Peter Nyrop Gregory M.Loeb Bruce I.Reisch Plant Breeding and Genetics Section School of Integrative Plant ScienceCornell UniversityIthacaNY 14853USA Department of Entomology Cornell AgriTechGenevaNY 14456USA Horticulture Section School of Integrative Plant ScienceCornell AgriTechGenevaNY 14456USA Instituto de Investigaciones Agropecuarias INIA La PlatinaSantiago 8831314Chile

The abundance of predatory phytoseiid mites,Typhlodromus pyri,important biological control agents of spider mite pests in numerous crops,is positively influenced by the density of leaf trichomes and tuft-form domatia in vein *** of the genetic regions controlling both trophic levels could facilitate the improvement of predatory mite habitat in breeding *** abundance of *** and non-glandular trichomes was measured in a segregating F1 family derived from the cross of the complex Vitis hybrid,‘Horizon’,with Illinois 547-1(*** B38×*** B9),finding positive correlation among *** density genetic maps were used to localize one major quantitative trait locus(QTL)on chromosome 1 of Illinois 547-1 associated with both predatory mite abundance and leaf *** QTL explained 23%of the variation in phytoseiid abundance and similar amounts of variance in domatia rating(21%),domatia size(16%),leaf bristle density(37%in veins and 33%in blades),and leaf hair density(20%in veins and 15%in blades).Another nine QTL distributed among chromosomes 1,2,5,8,and 15 were associated solely with trichome density,and explained 7–17%of the phenotypic ***,our results provide evidence of the genetic architecture of non-glandular trichomes in Vitis,with a major locus influencing trichome densities,domatia size and predatory mite *** information is relevant for breeding grapevines with a more favorable habitat for biological control agents.

关键词： breeding crops predator

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A next-generation marker genotyping platform(AmpSeq)in heterozygous crops:a case study for marker-assisted selection in grapevine

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Horticulture Research 2016年第1期3卷 302-313页

作者： Shanshan Yang Jonathan Fresnedo-Ramíre Minghui Wang Linda Cote Peter Schweitzer paola barba Elizabeth M Takacs Matthew Clark James Luby David C Manns Gavin Sacks Anna Katharine Mansfield Jason Londo Anne Fennell David Gadoury Bruce Reisch Lance Cadle-Davidson Qi Sun Horticulture Section School of Integrative Plant ScienceCornell UniversityGenevaNY 14456USA Bioinformatics Facility Cornell UniversityIthacaNY 14853USA Institute of Biotechnology Cornell UniversityIthacaNY 14853USA Plant Breeding and Genetics Section School of Integrative Plant ScienceCornell UniversityIthacaNY 14853USA Department of Horticultural Science University of MinnesotaSt PaulMN 55108USA Department of Food Science Cornell UniversityGenevaNY 14456USA Department of Food Science Cornell UniversityIthacaNY 14853USA USDA-ARS Grape Genetics Research Unit GenevaNY 14456USA Plant Science Department South Dakota State UniversityBrookingsSD 57007USA Plant Pathology and Plant-Microbe Biology Section School of Integrative Plant ScienceCornell UniversityGenevaNY 14456USA

Marker-assisted selection(MAS)is often employed in crop breeding programs to accelerate and enhance cultivar development,via selection during the juvenile phase and parental selection prior to ***-generation sequencing and its derivative technologies have been used for genome-wide molecular marker *** bridge the gap between marker development and MAS implementation,this study developed a novel practical strategy with a semi-automated pipeline that incorporates trait-associated single nucleotide polymorphism marker discovery,low-cost genotyping through amplicon sequencing(AmpSeq)and decision *** results document the development of a MAS package derived from genotyping-by-sequencing using three traits(flower sex,disease resistance and acylated anthocyanins)in grapevine *** vast majority of sequence reads(⩾99%)were from the targeted *** 380 individuals and up to 31 amplicons sequenced in each lane of MiSeq data,most amplicons(83 to 87%)had<10%missing data,and read depth had a median of 220–244×.Several strengths of the AmpSeq platform that make this approach of broad interest in diverse crop species include accuracy,flexibility,speed,high-throughput,low-cost and easily automated analysis.

关键词： crops breeding cultivar

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