| DISEASE | Powdery mildew observed | Powdery mildew caused by Erysiphe species : resistance/suspectible | N - Powdery Mildew was not observed on plants in this enviroment. May or may not be resistant | | PEA.2014.PULLMAN.PSP | W6 39729 2014psp SD | Not Available |
| GROWTH | Plant Height, final | Plant height of a typical plant in centimeters from the ground to tip at maturity. | 93 | | PEA.2014.PULLMAN.PSP | W6 39729 2014psp SD | Not Available |
| MORPHOLOGY | Node Number to First Flower | A count from the second trifid bract as one, up to and including the first flowering node when 50% of the plants in a planting are flowering. Expressed as an average of five randomly chosen plants (in integers). | 8 | | PEA.2014.PULLMAN.PSP | W6 39729 2014psp SD | Not Available |
| MORPHOLOGY | Flower Color | Flower color | W - White | | PEA.IMAGE.2011.SPILLMAN | W6 39729 2011psp SD | Not Available |
| MORPHOLOGY | Flower Color | Flower color | W - White | | PEA.2014.PULLMAN.PSP | W6 39729 2014psp SD | Not Available |
| MORPHOLOGY | Flowers per Peduncle | Maximum number of flowers per peduncle. | 2 | | PEA.2014.PULLMAN.PSP | W6 39729 2014psp SD | Not Available |
| MORPHOLOGY | Pod Color | Pod color, taken at first reproductive node at full pod stage. | G - Green | | PEA.2014.PULLMAN.PSP | W6 39729 2014psp SD | Not Available |
| MORPHOLOGY | Pod Shape | Pod shape measured at flat pod stage. | S - Straight | | PEA.2014.PULLMAN.PSP | W6 39729 2014psp SD | Not Available |
| MORPHOLOGY | Pod Apex | Pod apex measured at flat pod stage. | B - Blunt | | PEA.2014.PULLMAN.PSP | W6 39729 2014psp SD | Not Available |
| MORPHOLOGY | Leaflet Morphology | Leaflet morphology | N - Normal | | PEA.2014.PULLMAN.PSP | W6 39729 2014psp SD | Not Available |
| MORPHOLOGY | Stipules | Stipules | N - Normal | | PEA.2014.PULLMAN.PSP | W6 39729 2014psp SD | Not Available |
| MORPHOLOGY | Seed weight 100 | Weight of 100 seeds in grams. | 24 | | PEA.SEEDWEIGHT.WRPIS | W6 39729 2012psp SD | Not Available |
| MORPHOLOGY | Pods per peduncle | Number of pods per peduncle if the same number occurs on several plants in the accession. | 1 | | PEA.2014.PULLMAN.PSP | W6 39729 2014psp SD | Not Available |
| MORPHOLOGY | Peducle length | Peduncle length in millimeters | 49 | | PEA.2014.PULLMAN.PSP | W6 39729 2014psp SD | Not Available |
| OTHER | Image/picture1 | A picture or image | flower | | PEA.IMAGE.2012.CFERRY.PSP | W6 39729 2011psp SD | Not Available |
| OTHER | Image/picture1 | A picture or image | tendril | | PEA.IMAGE.2012.CFERRY.PSP | W6 39729 2011psp SD | Not Available |
| PHENOLOGY | Days to flower | Number of days from sowing seed to first observed flower | 64 | | PEA.2014.PULLMAN.PSP | W6 39729 2014psp SD | Not Available |
| SUBSET | Pea single plant | Accessions was developed by selecting seed from a single plant | Y - Yes, The accessions came from a single plant | | PEA.SINGLE.PLANT | W6 39729 2010o SD | Not Available |
| SUBSET | Pisum Genetic Data | Accessions with Genetic Data | SNP.PSP.PLUS.COLLECTION.2017 | | A ZIP'ed TEXT file with the markers and data (7.3 Mb in size)
A ZIP'ed TEXT file with the markers and data in VCF file suffix (28 Mb in size)
Abstract:
Globally, pea (Pisum sativum L.) is an important temperate legume crop for food, feed, and fodder, and many breeding programs exist to develop cultivars adapted to these end uses. In order to manage and utilize genetic resources for pea improvement, the USDA Pea Single Plant Plus Collection (PSPPC), which contains 431 Pisum accessions with morphological, geographic, and taxonomic diversity, was assembled. To maximize the value of this collection for trait mapping and genomics-assisted breeding projects, detailed genetic characterization was performed. To that end, genotyping-by-sequencing―a cost-effective method for de novo SNP marker discovery―was used to generate 66 591 high-quality SNPs. These data allowed us to identify accessions divergent from mainstream breeding germplasm that could serve as sources of novel, favorable alleles. In particular, a group of accessions from Central Asia appeared nearly as diverse as a sister species, P. fulvum, and subspecies, P. sativum subsp. elatius. Accession genotypes can be paired with new and existing phenotype data for trait mapping; as proof-of-concept, Mendel’s A gene controlling flower color was localized to its known position. SNP data were also used to define a smaller core collection of 108 accessions with similar levels of genetic diversity as the entire PSPPC, resulting in a smaller germplasm set for research screening and evaluation under limited resources. Taken together, the results presented in this study along with the release of a publicly available SNP data set comprise a valuable resource for supporting worldwide pea genetic improvement efforts.
Michael Mazourek, Plant Breeding and Genetics Section, School of Integrative Plant Science, Cornell University, Ithaca, NY 14853, USA Email: mm284@cornell.edu Phone: 607-254-7256 Fax: 607-255-6683
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