HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Pierce, R. O. Articles by Phillips, D. Search for Related Content PubMed Articles by Pierce, R. O. Articles by Phillips, D. Agricola Articles by Pierce, R. O. Articles by Phillips, D.

Inheritance of Delayed Leaf Senescence in Soybean¹

Inheritance studies of the delayed leaf senescence phenotype (DLS) in soybean, Glycine max (L.) Merr. were conducted in field environments over a 4-year period. Studies of F₂ and F₃ generations from the ‘Lee 68’ x ‘L63-1097’ cross indicated that two major genes, probably Dt₁,dt₁, affecting growth habit, and E₁,e₁, affecting flowering date, were involved, with the genotype dt₁dt₁e₁e₁ having the DLS phenotype. Selected lines in the F₆ generation that showed uniform DLS traits were crossed to ‘Amsoy 71’, ‘Elf’, ‘Evans’, ‘Harosoy L2’, and ‘Williams’. Segregation ratios in the F₂ and F₃ generations from crosses involving Amsoy 71, Harosoy L2, and Williams indicated that a single major gene, assumed to be Dt₁,dt₁, was involved in DLS expression. Studies with Harosoy L2 and ‘Clark LI’ isolines of known genotype at the Dt₁,dt₁, Dt₂,dt₂, E₁,e₁, and E₂,e₂ loci showed that the DLS phenotype was expressed fully only when the dt₁dt₁dt₂dt₂e₁e₁e₂e₂ genotype was present. Observations of F₂ populations and F₃ lines of crosses involving DLS lines and Elf, both of which have the dt₁dt₁e₁e₁ genotype, indicated that differences between the parents were due to an undetermined number of modifier genes with small effects. Results from crosses involving DLS lines and Evans were inconclusive.

Key Words: Glycine max (L.) Merr. • growth habit • flowering date

² Former graduate research assistant and professors, respectively. Dep of Agronomy and Range Science. Univ. of California, Davis, CA 95616.

Received for publication July 22, 1983.

This article has been cited by other articles:

				A. M. Ismail, A. E. Hall, and J. D. Ehlers Delayed-Leaf-Senescence and Heat-Tolerance Traits Mainly Are Independently Expressed in Cowpea Crop Sci., July 1, 2000; 40(4): 1049 - 1055. [Abstract] [Full Text]