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Natural and Mass Selection Estimates of Relative Fitness for the Soybean rps Gene 1
Author(s) -
Buzzell R. I.,
Haas Jerry H.
Publication year - 1972
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/cropsci1972.0011183x001200010024x
Subject(s) - biology , natural selection , selection (genetic algorithm) , population , gene , glycine , genetics , natural population growth , demography , amino acid , artificial intelligence , sociology , computer science
Relative‐fitness estimates were obtained for the rps gene that controls susceptibility to phytophthora rot in the soybean [ Glycine max (L.) Merr.] Composites of resistant and susceptible varieties carrying phenotypic markers were used. With natural selection under epiphytotic conditions, rpsrps was 75% as reproductive as RpsRps in 2 years and only 35% as reproductive in another year. Mass selection through sieving for larger seed further reduced the relative fitness of rpsrps . The estimates were applied to a theoretical bulk‐hybrid population segregating for Rps and rps to show the probable effects of natural and mass selection in increasing the proportion of resistant plants.