Pecan cultivars
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'Keilers' ('Stockbauer') (Nut Photo) Seedling selection made by Werner G. Keilers from yard tree growing in Travis Heights area of Austin, Texas in the early 1980's. Mr. Keilers was interested in patenting the selection, but that was not pursued. Graftwood was shared with the USDA ARS Pecan Station in Brownwood in 1983 under the name 'Keilers'. Keilers also shared graftwood with John Haschke of Harwood, TX, who shared it with Fred Stockbauer of Victoria, TX. Mr. Stockbauer was impressed with nut size and quality of the selection and began propagating it in the early 1990's, and it began to be called 'Stockbauer'. Graftwood of 'Stockbauer' came in 1994 to the pecan collections of the USDA ARS National Clonal Germplasm Repository, established in 1984 to include collections of the Brownwood station. Analysis using eight microsatellite primers showed the two accessions to be identical, in addition to having indistinguishable nut characters, dichogamy and disease reactions. Nut: obovate to elliptic, blocky with obtuse apex and base, often with a slight point at base; prominent thick, dark stripes at apex; round in cross section; 42 nuts/lb, 60% kernel; kernels golden to light brown, with medium, slightly tapered dorsal ridge, relatively narrow dorsal grooves; slight basal cleft; deep, usually open ventral groove. Protogynous with mid-season pollen shed and early pistillate receptivity. Susceptible (rated 3 on 1-5 scale) to pecan scab [Fusicladosporium effusum (Winter) Partridge and Morgan-Jones] and somewhat susceptible (rated 2 on 1-4 scale) to veinspot (Gnomonia nerviseda Cole). Keilers was assigned Plant Introduction number (PI) 518067.

LJ Grauke , Research Horticulturist &Curator
USDA-ARS Pecan Genetics
10200 FM 50
Somerville, TX 77879
fax: 979-272-1401

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