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Published in Crop Sci 21:233-237 (1981)
© 1981 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Root Characteristics of 44 Maize Inbreds Evaluated in Four Environments1

J. R. Jenison, D. B. Shank and L. H. Penny2

To study root characteristics, as well as potential tolerance to corn rootworms (Diabrotica spp.) of northern-adapted genotypes, 44 maize (Zea mays L.) inbreds were evaluated at two locations in both 1974 and 1975 for vertical-pull resistance at the pretassel and kernel milk stages of plant growth and, for root dry weight and root spread at the later growth stage. The inbreds also were evaluated at one location in 1975 for root-rot resistance at the kernel dent stage of growth to determine its effect on pull resistance. Highly significant differences existed among inbreds for all characters measured. Although interactions of inbreds with environments were evident, the magnitude of these interactions were relatively small when compared to the differences among inbreds. Highly significant positive rank correlations for inbreds between environments were found for vertical-pull resistance at both pretassel and milk stages; root dry weight; and nodal root spread. A highly significant simple correlation (r = 0.61) was found between root rot and percent loss in vertical-pull resistance at the dent stage. The root characteristics measured appear to be relatively stable over environments and effective selection for each should be possible.

Key Words: Zea mays L. • Vertical-pull resistance • Root dry weight • Root spread • Root rot • Rootworm tolerance

1 Cooperative investigations of the Plant Science Dep., South Dakota State Univ. and the USDA, SEA-AR, Northern Grain Insects Research Laboratory, Brookings, SD 57007 and 57006, respectively. Part of a thesis submitted by the senior author to the Graduate School of South Dakota State Univ. in partial fulfillment of the requirement for the M.S. Degree. Approved for publication by the Director, Agric. Exp. Stn., South Dakota State Univ., Brookings, as Journal Series No. 1625

2 Assistant in plant science, South Dakota State Univ., presently plant breeder, Sokota Hybrid Producers, Brookings, SD 57006; professor and plant breeder, Plant Science Dep., South Dakota State Univ.; and research geneticist (plants), USDA, SEA-AR, presently plant breeder, Asgrow Seed Company, Ames, IA 50010.

Received for publication March 25, 1980.


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S. Giuliani, M. C. Sanguineti, R. Tuberosa, M. Bellotti, S. Salvi, and P. Landi
Root-ABA1, a major constitutive QTL, affects maize root architecture and leaf ABA concentration at different water regimes
J. Exp. Bot., December 1, 2005; 56(422): 3061 - 3070.
[Abstract] [Full Text] [PDF]


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