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ACCESSIONPLANT NAMETAXONOMYORIGINGENEBANKIMAGEAVAILABILITYRECEIVEDSOURCE TYPESOURCE DATECOLLECTION SITECOORDINATESELEVATIONHABITATIMPROVEMENT LEVELNARRATIVE
0PI 691857HA 488Helianthus annuus L. North Dakota, United StatesNC72019DEVELOPEDGenetic materialHA 488 is a red sunflower seed weevil resistant F7-derived F9 maintainer oilseed sunflower germplasm. Red sunflower seed weevil resistance was evaluated in the field near Highmore, SD, in 2007 and 2008 with natural, consistent field infestations, and in Casselton, ND, in 2015, 2017, and 2018 with artificial infestation under head bags. Plants were harvested individually and assessed for damage by manual evaluation or by digital X-rays. The best linear unbiased estimate of percent damage for HA 488 per se was 6.6, over the five years, compared to 9.2 for the resistant parent, PI 431542, 32.3 for the susceptible parent, HA 441, and 18.9 for HA 467. HA 488 was statistically similar to the resistant parent, but statistically more resistant than HA 441 and HA 467. No significant genotype-by-environment interaction was detected.2097481PI 691857