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Registration of Six Peanut Germplasm Lines with Multiple Resistance
Author(s) -
Coffelt T. A.,
Porter D. M.,
Smith J. C.,
Mozingo R. W.
Publication year - 1987
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/cropsci1987.0011183x002700060067x
Subject(s) - germplasm , geneticist , library science , associate editor , biology , citation , resistance (ecology) , horticulture , agronomy , computer science , genetics
Six peanut (Arachis hypogaea L.) germplasm lines (Reg. no. GP-42 to GP-47) were released in 1986 by USDA-ARS in cooperation with the Virginia Agricultural Experiment Station. VGP 2 (PI 509536), VGP 3 (PI 509537), VGP 4 (PI 509538), VGP 5 (PI 509539), and VGP 6 (PI 509540) (Reg. no. GP-42 to GP-46, respectively) have moderate levels of resistance to Sclerotinia minor Jagger, the causal organism for Sclerotinia blight (5), and to Cercospora arachidicola Hori and Cercosporidium personata (Bert. & Curt.) Deighton, the causal organisms of early and late leafspot, respectively (6). VGP 7 (PI 509541) (Reg. no. GP-47) has moderate levels of resistance to S. minor (5) and southern corn rootworm (Diabrotica undecimpunctata howardi Barber) (4). Sclerotinia blight is currently one of the most damaging peanut diseases in the states of Virginia, North Carolina, Texas, and Oklahoma. Chemical control of leafspot currently increases production costs about 10% in the USA. Southern corn rootworm is one of the major soil insect pests of peanut in the Virginia-Carolina production area. The release of these germplasm lines should enhance the development of cultivars with multiple resistance and high yields. VGP 2, VGP 3, VGP 4, VGP 5, and VGP 6 (experimental no. VA 732813, VA 732815, VA 732816, VA 732817, and VA 732818, respectively) are pure line selections made in the F3 generation of a cross between Chico (1) and 'Florigiant' (3). VGP 7 (experimental no. VA 751014) is a pure line selection made in the F3 generation of a cross between GP-NC343 (2) and a selection from PI 319178. These germplasm lines are all large-seeded Virginia-type peanuts and have a spreading bunch growth habit, except VGP 7, which is spreading. VGP 7 has a tan seed testa, while the other germplasm lines have a pink testa. Grade characteristics, seed size, and yield are similar to Florigiant, except for the percentage of extra large kernels (undamaged seed that ride a 0.85 X 2.54-cm slotted screen), which is high compared to Florigiant. All lines mature slightly later (5 to 10 days in Virginia) than Florigiant. Most of the pods are two-seeded and similar to Florigiant in shape. Quality and processing characteristics are similar to Florigiant, except for lower blanchability. These germplasm lines are unacceptable commercially due to their late maturity and poor blanchability. Limited quantities of seed are available for distribution to peanut breeders and geneticists upon written request to the Tidewater Agricultural Experiment Station, Suffolk, VA 23437.