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Registration of ICZ3 and ICZ4 Maize Germplasms with Resistance to Spotted Stem‐Borer Chilo partellus (Swinhoe)
Author(s) -
Ajala S. O.,
Saxena K. N.
Publication year - 1994
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/cropsci1994.0011183x003400010086x
Subject(s) - chilo , germplasm , crop , biology , horticulture , library science , agronomy , pest analysis , computer science
plants is minimal (5). The frego bract trait would also be useful in a trap crop situation (1). However, frego bract confers increased sensitivity to Lygus spp. (9), a factor that would be mitigated to some extent by the nectariless trait in La. 850082FN (10). Fiber length and strength of La. 850082FN have been consistently lower than Deltapine 41; micronaire reading has been similar to that cultivar (2). Fiber length, strength, and micronaire of La. 850075FHG have been similar to Deltapine 41. Measurement of total seed gossypol by the aniline reaction method indicated that gossypol level in La. 850082FN was 95% of that in Deltapine 41 and 49% of La. Hg-660 (6); gossypol level in La. 850075FHG was 150% of that in Deltapine 41, and 76% of La. HG-660. The germplasm lines La. 850082FN and La. 850075FHG provide significant levels of resistance to two key cotton insect pests, and have good lint-yielding ability. These lines should be useful to cotton breeders attempting to develop insect resistant cultivars. Seed (25 g) of these lines is available for distribution to scientists upon written request to W. David Caldwell, Red River Res. Stn., P.O. Box 8550, Boissier City, LA 71113.