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Diploid True Potato Seed: Relationships among Seed Weight, Germination, and Seedling Vigor

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Abstract

The use of true potato seed (TPS) offers many advantages over the tuber pieces used in current potato cropping systems. Hybrid TPS based on diploid inbred lines has the potential to revolutionize the potato industry. In preparation for the transition to TPS, seed productivity traits must be characterized. The present study aims to provide data on seed germination rates and seedling vigor of diploid potatoes. The germplasm for this study consisted of families from a cross between DM1-3 and M6 that have been inbred to varying degrees. Seedling leaf area and percent germination were evaluated on 51 populations across six dates. Positive Pearson correlations were found between seed weight, percent germination, and seedling leaf area. Significant levels of variation were detected between lineages, generations, and lineage by generation interactions using ANOVA for leaf area and percent germination. Families that exhibited vigorous growth by 14-18 days post sowing continued to sustain high growth rates while families that did not exhibit vigorous growth at this time did not experience a drastic increase in growth rate. This timeframe will be an important stage in which to ensure a seedlings health in order to maximize its potential.

Resumen

El uso de semilla verdadera de papa (TPS) ofrece muchas ventajas sobre los fragmentos de tubérculo usados en los sistemas actuales del cultivo. Híbridos de TPS basados en líneas endogámicas diploides tienen el potencial de revolucionar la industria de la papa. Deben de caracterizarse particularidades de productividad de la semilla en preparación para la transición a TPS. El presente estudio pretende proporcionar datos en niveles de germinación de semilla y vigor de las plántulas de papas diploides. El germoplasma para este estudio consistió de familias de una cruza entre DM1-3 y M6 que han sido autocruzadas a varios grados. Se evaluaron el área foliar de las plántulas y el porcentaje de germinación en 51 poblaciones a lo largo de seis fechas. Se encontraron correlaciones positivas de Pearson entre el peso de semilla, porcentaje de germinación, y área foliar de la plántula. Se detectaron niveles significativos de variación entre líneas, generaciones, y entre sus interacciones usando ANAVA para área foliar y porcentaje de germinación. Las familias que exhibieron crecimiento vigoroso por 14-18 días post siembra continuaron el mantenimiento de altos niveles de crecimiento, mientras que familias que no exhibieron crecimiento vigoroso en ese período no experimentaron un incremento drástico en el nivel de crecimiento. Este lapso será un estado importante en el cual se asegura sanidad de la plántula para maximizar su potencial.

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Acknowledgements

Research supported by USDA NIFA 2014-67013-22434. The assistance of Kelley Manbeck (UW-Madison) and Andy Hamernik (USDA-ARS) is gratefully acknowledged.

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Authors and Affiliations

  1. USDA-ARS, Vegetable Crops Research Unit, 1575 Linden Drive, Madison, WI, 53706, USA

    Shelley Jansky

  2. Department of Horticulture, University of Wisconsin-Madison, Madison, WI, 53706, USA

    Ryan Alpers & Shelley Jansky

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  1. Ryan Alpers
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  2. Shelley Jansky
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Correspondence to Shelley Jansky.

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Alpers, R., Jansky, S. Diploid True Potato Seed: Relationships among Seed Weight, Germination, and Seedling Vigor. Am. J. Potato Res. 96, 217–224 (2019). https://doi.org/10.1007/s12230-018-9675-8

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