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A Single Dominant Gene for Rust Resistance in Pearl Millet 1
Author(s) -
Andrews D. J.,
Rai K. N.,
Singh S. D.
Publication year - 1985
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/cropsci1985.0011183x002500030032x
Subject(s) - pennisetum , biology , rust (programming language) , hybrid , germplasm , backcrossing , pearl , puccinia , horticulture , hybrid seed , agronomy , veterinary medicine , gene , genetics , mildew , medicine , theology , computer science , programming language , philosophy
Pearl millet rust ( Puccinia penniseti Zimm = P. substriata var. indica ) can reduce yields in hybrid seed production fields, quality in forage, and occasionally grain yields. Results are reported on the inheritance of a source of rust resistance discovered in crosses which involved one Sf progeny, #2696‐1‐4, selected from a pearl millet [Pennisetum americanum (L.) Leeke] germplasm accession originating from Chad. F 1 , F 2 , BC 1 , BC 2 plants and the parents of crosses between the resistant source and two different susceptible male sterile lines were evaluated under severe rust pressure at three locations in India. Progeny of 2696‐1‐4 and the F 1 hybrids between 2696‐1‐4 and male sterile lines were all resistant, while the male sterile lines were severely rusted at each location. In general, F 2 populations from susceptible ✕ resistant crosses showed a good fit to a 3 resistant: 1 susceptible ratio and the backcrosses involving susceptible male‐sterile lines as recurrent parents showed a reasonably good fit to 1 resistant:! susceptible, indicating that rust resistance is conferred by a single dominant gene and susceptibility by its recessive allele. We propose the symbols Rpp 1 and rpp 1 for these genes.