INBREEDING DEPRESSION IN A SELF‐COMPATIBLE, ANDRODIOECIOUS CRUSTACEAN, EULIMNADIA TEXANA
نویسندگان
چکیده
منابع مشابه
Inbreeding effects on sperm production in clam shrimp (Eulimnadia texana)
Hypothesis: Inbreeding depression is manifest in lower sperm production. Organism: Freshwater crustaceans (clam shrimp – Eulimnadia texana), from the southwestern United States, which have high levels of inbreeding. Methods: Comparisons of semi-thin sections of the male gonad among selfed and outcrossed siblings from four families. Results: There was a twofold reduction in sperm production in i...
متن کاملMaintenance of androdioecy in the freshwater shrimp, Eulimnadia texana: estimates of inbreeding depression in two populations.
Androdioecy is an uncommon form of reproduction in which males coexist with hermaphrodites. Androdioecy is thought to be difficult to evolve in species that regularly inbreed. The freshwater shrimp Eulimnadia texana has recently been described as both androdioecious and highly selfing and is thus anomalous. Inbreeding depression is one factor that may maintain males in these populations. Here w...
متن کاملAncient androdioecy in the freshwater crustacean Eulimnadia.
Among the variety of reproductive mechanisms exhibited by living systems, one permutation--androdioecy (mixtures of males and hermaphrodites)--is distinguished by its rarity. Models of mating system evolution predict that androdioecy should be a brief stage between hermaphroditism and dioecy (separate males and females), or vice versa. Herein we report evidence of widespread and ancient androdi...
متن کاملIntersexual conflict during mate guarding in an androdioecious crustacean
Traditional interpretations of mating behaviors assume cooperation between the sexes. The field of sexual conflict provides a contrasting view: The sexes are commonly in conflict because they diverge in benefits/costs of reproduction. Precopulatory mate guarding, wherein males attempt to monopolize mates by physically pairing before fertilization, is one expected case of conflict. Initial guard...
متن کاملA New Standard for Crustacean Genomes: The Highly Contiguous, Annotated Genome Assembly of the Clam Shrimp Eulimnadia texana Reveals HOX Gene Order and Identifies the Sex Chromosome
Vernal pool clam shrimp (Eulimnadia texana) are a promising model system due to their ease of lab culture, short generation time, modest sized genome, a somewhat rare stable androdioecious sex determination system, and a requirement to reproduce via desiccated diapaused eggs. We generated a highly contiguous genome assembly using 46× of PacBio long read data and 216× of Illumina short reads, an...
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ژورنال
عنوان ژورنال: Evolution
سال: 1999
ISSN: 0014-3820,1558-5646
DOI: 10.1111/j.1558-5646.1999.tb03782.x