The evolution of haploid, diploid and polymorphic haploid-diploid life cycles: the role of meiotic mutation.
نویسنده
چکیده
Here I present a simple population genetic model to investigate the evolution of polymorphic haploid-diploid life cycles. The key feature of the model is the assumption of mutation occurring during meiosis. I show that, in addition to regions favoring haploid or diploid life cycles, there are substantial regions of the parameter space under which polymorphic haploid-diploid life cycles are expected to evolve.
منابع مشابه
Ecology and the Evolution of Biphasic Life Cycles.
Sexual eukaryotes undergo an alternation between haploid and diploid nuclear phases. In some organisms, both the haploid and diploid phases undergo somatic development and exist as independent entities. Despite recent attention, the mechanisms by which such biphasic life cycles evolve and persist remain obscure. One explanation that has received little theoretical attention is that haploid-dipl...
متن کاملSelection and the evolution of genetic life cycles.
The evolution of haploid and diploid phases of the life cycle is investigated theoretically, using a model where the relative length of haploid and diploid phases is under genetic control. The model assumes that selection occurs in both phases and that fitness in each phase is a function of the time spent in that phase. The equilibrium and stability conditions that allow for all-haploid, all-di...
متن کاملThe evolution of the life cycle of brown seaweeds
The brown seaweeds (Phaeophyta) are well-suited for testing theories of the evolution of the sexual alternation of haploid and diploid generations because of the great diversity of life cycles within the phylum. Three theories are investigated in this paper. (1) Diploid growth evolves because it has the effect of complementing deleterious recessive mutations. This is rejected because (a) ancest...
متن کاملLectures on Mathematics in the Life Sciences Volume The Role of Deleterious and Bene cial Mutations in the Evolution of Ploidy Levels
All sexual organisms experience a haploid and a diploid phase during their life cycle yet the extent of each phase is remarkably variable We explore the evolution of a locus that alters the timing of meiosis hence altering the proportion of the life cycle spent in either the haploid or diploid phase Evolution of the life cycle will occur in response to viability selection acting at tness loci e...
متن کاملThe Role of Deleterious and Beneficial Mutations in the Evolution of Ploidy Levels
All sexual organisms experience a haploid and a diploid phase during their life cycle, yet the extent of each phase is remarkably variable. We explore the evolution of a locus that alters the timing of meiosis, hence altering the proportion of the life cycle spent in either the haploid or diploid phase. Evolution ofthe life cycle will occur in response to viability selection acting at fitness l...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Genetics
دوره 156 2 شماره
صفحات -
تاریخ انتشار 2000