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Diallel Analyses of Resistance to the Adult Pea Leaf Weevil in Peas 1
Author(s) -
Auld D. L.,
O'Keeffe L. E.,
Murray G. A.,
Smith J. H.
Publication year - 1980
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/cropsci1980.0011183x002000060021x
Subject(s) - biology , weevil , diallel cross , sativum , cultivar , pisum , field pea , agronomy , horticulture , resistance (ecology) , botany , hybrid
Plant Introductions (PI) of peas ( Pisum sativum L.) resistant to the adulit pea leaf weevil, Sitona lineatus (L.) were crossed to cultivars of winter peas [ P. sativum subsb. arvense (L.) Poir] and spring peas in a nonreciprocal diallel manner. The eight parental lines and F 1 and P 2 populations were evaluated for resistance to the pea leaf weevil under laboratory and/or field conditions. Combining ability analyses indicated that significant variation due to general combining ability (GCA) effects were present for resistance to the adult pea leaf weevil. Specific combining ability (SCA) had a significant effect on weevil resistance in only half of the eight analyses. There appeared to be sufficient GCA to support a breeding program for the development of weevil resistant cultivars. PI 263010 and PI 343983 had large negative GCA estimates and appear to be the best parents to use in the development of resistant cultivars. These PI's were generally more resistant than the commercial cultivars tested in both field and laboratory evaluations. The PI's expressed resistance under the intense pressure of 16 adult pea leaf weevils per plant in the laboratory.