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Evaluation of a Greenhouse Screening Technique for Iron‐Deficiency Chlorosis of Sorghum 1
Author(s) -
Bowen C. Roger,
Rodgers D. M.
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/cropsci1987.0011183x002700050040x
Subject(s) - chlorosis , sorghum , loam , iron deficiency , biology , agronomy , greenhouse , horticulture , population , soil water , ecology , medicine , demography , sociology , anemia
Iron‐deficiency chlorosis can reduce sorghum [ Sorghum bicolor (L.) Moench] yields in certain soils of the Great Plains. The purpose of this study was to determine if Fe efficiency and/or biomass of field‐grown sorghum plants can be predicted by evaluating greenhouse seedlings grown in Ulysses silt loam soil (fine‐silty, mixed, mesic Aridic Haplustolls) known to induce Fe‐deficiency chlorosis. Seedlings were grown in a soil/sand mixture high in pH and Ca, and low in organic matter and available Fe. Progeny of randomly selected lines from KMP1Fe, a population that has undergone recurrent phenotypic selection for Fe efficiency, were evaluated. Three height classes were established to reduce inter‐plot interaction between genotypes of different height in field studies. A control treatment consisted of plants grown in a soil/sand mixture with Fe added as FeEDDHA (ethylenediaminedi(O‐hydroxyphenylacetate)). Seedlings were evaluated for chlorosis symptoms, vigor, shoot length, and dry weight. Entry mean squares for chlorosis score were significant for the short and tall groups, but not for the medium. Greenhouse results were compared to results from a field experiment. Final greenhouse chlorosis scores for entries grown in the unamended soil mixture were significantly correlated with field chlorosis score and biomass. Regression analysis on the short height group grown in the unamended soil mixture indicated that field chlorosis score could be predicted by greenhouse chlorosis score ( r 2 = 0.80). Similar results were noted for field chlorosis score for the other height groups.