Read e-book online Evolutionary Genetics of Fishes PDF

By Fred W. Allendorf, Gary H. Thorgaard (auth.), Bruce J. Turner (eds.)

ISBN-10: 1468446525

ISBN-13: 9781468446524

ISBN-10: 1468446541

ISBN-13: 9781468446548

It is my desire that this number of reports might be profitably learn by way of all who're attracted to evolutionary biology. notwithstanding, i want to particularly goal it for 2 disparate teams of biologists seldom males­ tioned within the comparable sentence, classical ichthyologists and molecular biologists. considering that classical instances, and even perhaps ahead of, ichthyologists have stood in awe on the super variety of fishes. the majority of attempt within the box has consistently been directed towards realizing this variety, i. e. , extracting from it a coherent photo of evolutionary procedures and lineages. This attempt has, in flip, continually been overwhelmingly established upon morphological comparisons. the sensible merits of such compari­ sons, in particular the convenience with which morphological facts might be had from preserved museum specimens, are manifold. yet thought of objectively (outside its context of "tradition"), morphological research by myself is a negative instrument for probing evolutionary techniques or elucidating relationships. The techniques of "relationship" and of "evolution" are inherently genetic ones, and the genetic bases of morphological characteristics are seldom identified intimately and regularly unknown totally. previous during this century, numerous staff, particularly Gordon, Kosswig, Schmidt, and, in his salad years, Carl Hubbs, pioneered the appliance of genetic ideas and modes of reasoning to ichthyology. whereas yes that the majority modern ichth­ yologists are conversant in this physique of labor, i'm virtually both definite that few of them regard it as pertinent to their very own efforts.

Show description

Read or Download Evolutionary Genetics of Fishes PDF

Best genetics books

Rice Genetics IV - download pdf or read online

Geneticists give a contribution on quite a lot of issues during this e-book, from classical genetics to the main complicated study on sequencing of the rice genome and practical genomics. They assessment advances in rice study and speak about molecular markers, genome association and gene isolation.

Stephen J. Banta's Rice Genetics PDF

"The Rice Genetics assortment" of prior symposia and different chosen literature includes approximately 4,400 pages of searchable info on rice genetics and cytogenetics released by way of the IRRI and its companions due to the fact 1964. as well as the 5 genetics symposia held at 5-year periods for the reason that 1985, the gathering comprises vintage guides that kicked off major reporting on those matters within the early Nineteen Sixties.

Read e-book online The troubled helix : social and psychological implications PDF

The supply of more and more refined details on our genetic make-up provides participants, and society as a complete, with tough judgements. even though it is was hoping that those advances will eventually cleared the path to the powerful therapy and screening of all illnesses with a genetic part, at the moment a lot of people worry over the data that they've or will enhance an incurable genetic affliction.

Additional resources for Evolutionary Genetics of Fishes

Example text

Many of the results upon which this model is based come from recent work by Wright and his colleagues. , 1980). ,. 2 Figure 4. Diagram of proposed model of residual tetrasomic inheritance at isoloci. Loci A near the centromere show disomic inheritance while distal loci B show intermediate disomic-tetrasomic segregation because of secondary pairing during meiosis of homeologs and crossovers. TETRAPLOIDY AND EVOLUTION OF SALMONIDS 31 A ~1 j:l:.. --. 0- Figure 5. Diagram of proposed model of pseudolinkage resulting in an excess of nonparental gametes produced by hybrid individuals.

At a tetrasomic locus, the allelic frequency at equilibrium will be equal to the fourth root of u (assuming no double reduction divisions). Thus, the allelic frequency at a tetrasomic locus will be much higher than at a disomic locus. 001 at a disomic locus. The inheritance at a tetrasomic locus will be more complex. 000 Table X Expected Inheritance Patterns for a Recessive Trait at a Single Locus and Duplicated Loci for Matings between Affected and Normal Parents Inheritance pattern N onduplicated Isoloci" Tetrasomic b Parental genotype Normal Affected AA Aa AAIAA AalAA AalAa Aalaa AAAA AAAa AAaa Aaaa aa aa aalaa aalaa aalaa aalaa aaaa aaaa aaaa aaaa "Assuming no linkage.

Comparison of linkage relationships in different species should provide insight into the process of post-tetraploidy chromosomal evolution in salmonids. Unfortunately, all of the available linkage data are restricted to a single subfamily: Sal- TETRAPLOIDY AND EVOLUTION OF SALMONIDS 23 moninae. , 1982). Males show a much lower frequency of recombination than females (Table VI). , 1981). The differences in recombination frequencies and in the occurrence of meiotic multivalentsbetween sexes suggest that there are substantial differences in meiosis between male and female salmonids.

Download PDF sample

Evolutionary Genetics of Fishes by Fred W. Allendorf, Gary H. Thorgaard (auth.), Bruce J. Turner (eds.)


by Donald
4.1

Rated 4.00 of 5 – based on 31 votes