Dataset for: Potato seed degeneration in Ecuador uri icon

abstract

  • Vegetative multiplication of potato in the field can lead to an accumulation of pest and pathogens such as fungi, bacteria and mainly virus in the seed over successive cycles of reproduction. This process is known as seed degeneration, where the main vectors for virus infection and transmission are aphids. This study was carried out to evaluate the rate of seed degeneration in two potato cultivars, at different altitudes and considering the use of different on-farm seed management options in the Ecuadorian Andes with the aim to support the promotion of an integrated seed health strategy. The study involved the cultivars INIAP-Fripapa and Superchola (susceptible and resistant to degeneration, respectively, according to farmers' perceptions). The field trials were carried out at three altitudes (<2700 masl, 3000 masl and > 3400 masl) during 3 cropping cycles of successive vegetative reproduction. Twelve plots of 49 m2 were planted each year; 2 plots of each cultivar at each altitude/site, in which 3 types of seed management were carried out: positive selection, roguing and random selection. We evaluated: (1) virus incidence (PVX, PVY, PVS, PLRV, APLV and APMoV) in plants at emergence, flowering and in tubers using the DAS-ELISA; (2) abundance of aphids; (3) incidence and severity of pest damage and diseases in tubers; and (4) tuber yield. Similar data were taken from 10 farmers' fields, and separate trials were done to estimate the efficiency of auto-infection (percentage of infected progeny tubers from an infected mother tuber) of PVY at the three altitudes

publication date

  • 2017