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Lesion Nematode Resistance in Peanuts 1
Author(s) -
Smith O. D.,
Boswell T. E.,
Thames W. H.
Publication year - 1978
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1978.0011183x001800060026x
Subject(s) - arachis hypogaea , biology , nematode , cultivar , resistance (ecology) , horticulture , nematology , point of delivery , lesion , botany , agronomy , ecology , pathology , medicine
Six peanut ( Arachis hypogaea L.) introductions and two commercial cultivars (‘Starr’ and ‘Spancross’) were evaluated for lesion nematode ( Pratylenchus brachyurus (Godfrey) Felip & Sch. Stek) resistance under field conditions. Multiple harvests were used to compensate for maturity differences among peanut lines. Nematicide treatments were included to aid in evaluating the level of resistance. Shells of the peanut introductions PI 295233 and PI 290606 had significantly less pod discoloration and fewer nematodes from shell extractions than the commercial Spanish cultivars. Nematode extractions from root tissue supported the results from the shell samples. Three additional PI's showed lesser degrees of resistance. Subsequent comparisons among Starr, ‘Florunner’, PI 295233 and PI 290606 verified the results. Significantly more (P = 0.00036) nematodes were extracted from shell tissue of Starr and Florunner than of the other two entries. More nematodes (P=0.00003) were extracted from root samples of Starr than of the other three entries. The possibility that resistance is controlled separately in shell and root tissue is suggested.