Studies on the nature of field resistance of the potato to late blight

Evaluation of Potato Genotypes for Foliar and Tuber Resistance against Phytophthora infestans Causing Late Blight of Potato under Subtropical Plains of India

“…However, they reported that the ranking of the genotypes with almost similar level of resistance in laboratory was not exactly the same as obtained in the field. Knutson (1962) also reported that the expression of non-specific resistance of the leaves of the three cultivars grown in a glasshouse was closely related to that of field grown plants, however one cultivar was resistant to blight when grown in a glass house but susceptible in the fields. Limitation of greenhouse screening is that the controlled environment may not adequately mimic the complexities of a field trial.…”

Methods of Choosing Parental Pairs for Crosses in the Breeding of Self-Pollinating Crops for Yield

“…Исходный материал по устойчивости к фитофторозу традиционно исследуют в поле при наличии высокого инфекционного фона, а также в лаборатории при инокуляции листьев, клубней и целых растений (Lapwood, 1961;Hodgson, 1962;Knutson, 1962). Изучение материала нередко проводят в рамках интернационального сотрудничества, используя изоляты, выделенные из популяций P. infestans, распространенных в разных регионах мира (Forbes et al, 2005).…”

Effects of temperature and light on non‐race‐specific resistance of potato leaflets to late blight

“…Major gene resistance has been largely discredited for long-term disease control because races of P. infestans carrying virulence genes that overcome the plant's resistance soon dominate the pathogen population, Non-race-specific resistance, also known as horizontal, field, polygenic or minor gene resistance, is much more durable (Wastie, 1991) and currently offers the only long-term environmentally benign solution to blight control, Hodgson (1961) considered that expression of non-race-specific resistance of foliage to blight was so highly dependent on environmental conditions that it was difficult to assess. Knutson (1962) found that, while the expression of non-racespecific resistance of the leaves of three cultivars grown in a glasshouse was closely related to that of field-grown plants, one cultivar was resistant to blight when grown in a glasshouse but susceptible in the field. Umaerus (1959) and Parker (1989) reported that cultivar Alpha was susceptible to blight in Mexico, but resistant in Minnesota and New York State.…”