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The Journal of Heredity 1981:72(2):141-142
© 1981 The American Genetic Association 72:141-142

other

Inheritance of two chlorophyll-deficient mutants in soybeans

C. R. Nissly, R. L. Bernard, and C. N. Hittle

The authors are, respectively, lecturer in crops, University of Zambia-Agriculture, Box 2379, Lusaka, Zambia; research geneticist, USDA-SEA-AR and University of Illinois, Urbana, IL 61801; and professor of plant breeding, Department of Agronomy, INTSOY, University of Illinois, Urbana. IL 61801. Please address reprint requests to Dr. Bernard.

Abstract

The inheritance of two chlorophyll mutants in soybean lines T134 and T162 was studied by observing the F2 and F3 generations of T134 X Clark-k and T162 X Clark-k crosses. The results showed that the chlorophyll deficiences of T13A and T162 are each controlled by a single recessive gene. T134 and T162 were crossed with other viable chlorophyll-deficient lines from the USDA Soybean Type Collection. All crosses produced ratios of normal and chlorophyll-deficient phenotypes with the exception of T134 + T116, which produced only chlorophyll-deficient F1 and F2 plants. Apparently, chlorophyll deficiency in T162 is caused by a single recessive gene differing from all previously reported genes. We have assigned the symbol y17 to it. T134 appears to carry the recessive y5 gene reported in T116.


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