Evidence of 2n microspore production in a natural diploid population of Turnera sidoides subsp. carnea and its relevance in the evolution of the T. sidoides (Turneraceae) autopolyploid complex

SUMMARYThe Haldane-Muller principle of mutation load is generalized so as to be applicable to both cases of strong and very weak selection with any time variation. It is proved that in an infinite asexual haploid population, the average Malthusian parameter m¯ of a population, the evolution rate ν, and the total mutation rate μ satisfy the relation ∂m¯/∂/∂μ = ν/μ−1, so long as each Malthusian parameter is independent of μ. A similar result is also true in a diploid population under genie selection. It is discussed how the above relation gives a restriction on the possible range of values of relative evolution rate ν/μ.

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Establishment of a tetraploid cytotype in a diploid population: Effect of relative fitness of the cytotypes

Journal of Evolutionary Biology ◽

10.1046/j.1420-9101.1991.4020195.x ◽

1991 ◽

Vol 4 (2) ◽

pp. 195-207 ◽

Cited By ~ 146

Author(s):

Francois Felber

Keyword(s):

Relative Fitness ◽

Diploid Population ◽

Population Effect

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The survival of a mutant gene under selection

Journal of the Australian Mathematical Society ◽

10.1017/s1446788700025155 ◽

1959 ◽

Vol 1 (1) ◽

pp. 121-126 ◽

Cited By ~ 17

Author(s):

P. A. P. Moran

Keyword(s):

Population Model ◽

Phenotypic Selection ◽

Mutant Gene ◽

Diploid Population ◽

Genetic Population ◽

Single Mutant

AbstractThe problem of the survival of a single mutant in a haploid genetic population when there exists selection is considered for a type of population model in which the generations ar overlapping. The results are compared with the previous work of Fisherand others for other models. The need is stressed for a solution of the same problem in a diploid population with general phenotypic selection coefficients.

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CHROMOSOME PAIRING IN POA ANNUA L.

Canadian Journal of Genetics and Cytology ◽

10.1139/g73-066 ◽

1973 ◽

Vol 15 (3) ◽

pp. 549-551 ◽

Cited By ~ 2

Author(s):

W. M. Ellis ◽

B. T. O. Lee ◽

D. M. Calder

Keyword(s):

Chromosome Pairing ◽

Breeding System ◽

Tetraploid Plant ◽

Poa Annua ◽

Diploid Population ◽

Bivalent Formation

Cytological studies carried out on six tetraploid and one diploid population and a synthesized tetraploid plant have shown regular bivalent formation at meiosis. This regularity appears to be genetically controlled in this species. Plants from all the populations behave as diploids. The implications of this regular disomic chromosome pairing on recombination, variation and the breeding system of P. annua are considered.

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EVOLUTIONARY STUDIES OF ATRIPLEX: A RELIC GIGAS DIPLOID POPULATION OF ATRIPLEX CANESCENS

American Journal of Botany ◽

10.1002/j.1537-2197.1975.tb12349.x ◽

1975 ◽

Vol 62 (3) ◽

pp. 236-245 ◽

Cited By ~ 10

Author(s):

Howard C. Stutz ◽

James M. Melby ◽

Gordon K. Livingston

Keyword(s):

Atriplex Canescens ◽

Diploid Population ◽

Evolutionary Studies

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A mathematical analysis of an age-space-structured autosomal diploid population dynamics model with random mating and females' pregnancy

Lithuanian Mathematical Journal ◽

10.1007/bf02465820 ◽

1998 ◽

Vol 38 (4) ◽

pp. 360-373

Author(s):

V. Skakauskas

Keyword(s):

Population Dynamics ◽

Mathematical Analysis ◽

Random Mating ◽

Dynamics Model ◽

Diploid Population ◽

Population Dynamics Model

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Evolution in diploid populations by continuity of gametic types

Advances in Applied Probability ◽

10.1017/s0001867800038957 ◽

1973 ◽

Vol 5 (01) ◽

pp. 55-65

Author(s):

Ilan Eshel

Keyword(s):

Random Mating ◽

Long Term Effects ◽

Diploid Population ◽

Selection Pressures ◽

Genetic Types ◽

Diploid Populations ◽

Mutation And Selection

This work studies the long-term effects of mutation and selection pressures on a diploid population embracing many genetic types. A number of results previously established for the simpler asexual case (see [4]) are extended to the cases of random mating and complete inbreeding (Theorem 1), and then, under particular conditions, to certain circumstances of mixed random mating and inbreeding (Theorem 3 and Corollary 1). Several implications for sex and diploidity are drawn from Theorem 2 and its corollaries. Further biological interpretations of these findings, especially of Theorem 2, are given in [3].

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