International Cooperative Screening for Resistance of Peanut to Rust and Late Leaf Spot

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Abstract
Following preliminary screening at Tifton, Georgia, USA, 23 peanut (A. hypogaea) germ plasma lines were evaluated at Isabella, Puerto Rico, and 22 of the 23 lines at both Patancheru, Andhra Pradesh, India, and Guangzhou, Guangdong, People''s Republic of China, for resistance to Puccinia arachidis rust in field trials during 1976-1981. At Patancheru and Guangzhou, the 22 entries were also evaluated for resistance to Cercosporidium personatum late leaf spot. Nine entries (PI[plant introduction] 215696, PI 259747, PI 315608, PI 341879, PI 350680, PI 381622, PI 393646, PI 405132, PI 407454) were resistant to rust at all 3 locations. Six entries (PI 215696, PI 259747, PI 341879, PI 350680, PI 381622, PI 405132) were resistant to both rust and late leaf spot in Patancheru and Guangzhou and can be useful in breeding for multiple disease resistance in peanut. Four of these 6 entries (PI 259747, PI 350680, PI 381622, PI 405132) were previously reported resistant to both rust and late leaf spot.

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