Sexual Hieracium pilosella plants are better inter-specific, while apomictic plants are better intra-specific competitors
نویسندگان
چکیده
منابع مشابه
pilosella plants are better inter - specific , while apomictic plants are better intra - specific competitors
Apomixis, asexual reproduction through seeds, occurs in over 40 plant families. This widespread phenomenon can lead to the fixation of successful genotypes, resulting in a fitness advantage. On the other hand, apomicts are expected to lose their fitness advantage if the environment changes because of their limited evolutionary potential, which is due to low genetic variability and the potential...
متن کاملSexual and apomictic reproduction in Hieracium subgenus pilosella are closely interrelated developmental pathways.
Seed formation in flowering plants requires meiosis of the megaspore mother cell (MMC) inside the ovule, selection of a megaspore that undergoes mitosis to form an embryo sac, and double fertilization to initiate embryo and endosperm formation. During apomixis, or asexual seed formation, in Hieracium ovules, a somatic aposporous initial (AI) cell divides to form a structurally variable aposporo...
متن کاملSmaller beetles are better scramble competitors at cooler temperatures.
The role of temperature is central to both organic evolution and ecological processes. However, how temperature affects selection on body size is unknown. We tested whether small seed beetles (Stator limbatus) have an advantage over large beetles during scramble competition for mates, and whether this advantage varies with temperature. Within lines of beetles artificially selected to be large v...
متن کاملAre exotic herbivores better competitors? A meta-analysis.
Competition plays an important role in structuring the community dynamics of phytophagous insects. As the number and impact of biological invasions increase, it has become increasingly important to determine whether competitive differences exist between native and exotic insects. We conducted a meta-analysis to test the hypothesis that native/ exotic status affects the outcome of herbivore comp...
متن کاملIntra-sexual selection in cooperative mammals and birds: why are females not bigger and better armed?
In cooperatively breeding mammals and birds, intra-sexual reproductive competition among females may often render variance in reproductive success higher among females than males, leading to the prediction that intra-sexual selection in such species may have yielded the differential exaggeration of competitive traits among females. However, evidence to date suggests that female-biased reproduct...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Perspectives in Plant Ecology, Evolution and Systematics
سال: 2014
ISSN: 1433-8319
DOI: 10.1016/j.ppees.2014.01.001