Month: September 2022

INCOMPLETE PROCESS. "Whole genome duplication is considered to be a significant contributor to angiosperm speciation due to accumulation of rapid, strong interploid reproductive isolation. However, recent work suggests that interploid reproductive isolation may not be complete, especially among higher order cytotypes." https://lnkd.in/eyABWAW View in LinkedIn

CURIOUS CASE. "Sexual organisms produce haploid gametes derived from meiosis. Fertilization of the egg by the sperm restores the chromosome number to that of the somatic cells. However, certain factors can lead to the formation of unreduced gametes, in which the genetic material is identical to that of somatic cells, in some cases specifically in females." https://lnkd.in/eWhHmsj View in LinkedIn

UNREDUCED GAMETES. "This phenomenon is important and widespread across numerous eukaryotic taxa, including yeasts, plants, insects, amphibians, reptiles, and fish. Unreduced gametes with somatic chromosome numbers represent a special germplasm in facilitating speciation and the production of new polyploid species." https://lnkd.in/eWhHmsj View in LinkedIn

ROLE OF UNREDUCED GAMETES. "Several studies have suggested that the majority of polyploidization events in both plants and animals may have resulted from unreduced gamete formation. This phenomenon is widely accepted as an important evolutionary force in both plants and animals." https://lnkd.in/eWhHmsj View in LinkedIn

HYBRIDS AS UNUSUAL CASES. "Generally, unreduced gametes are frequently produced by hybrids, facilitating polyploidization. This phenomenon has been observed in a range of animal and plant species." https://lnkd.in/eWhHmsj View in LinkedIn

IMPACT OF STRESS. "Interestingly, environmental stress also often triggers unreduced gamete production. In response to stress, the formation of unreduced gametes may facilitate polyploid speciation and escape from genetic pressure and hostile environments." https://lnkd.in/eWhHmsj View in LinkedIn

REPRODUCTIVE ISOLATION. "One of the key modes of plant speciation is polyploidy (duplication of all chromosomes), which can lead to sympatric speciation because it is often associated with limited gene flow and reproductive isolation." https://lnkd.in/eJvn-m7 View in LinkedIn

REMARKABLE TWIST. "We demonstrate that unreduced gametes combining freely among parents of different ploidy are the core driver of such systems and that the survival of individual gametic combinations drives reproductive isolation." https://lnkd.in/eJvn-m7 View in LinkedIn

NUMEROUS PATHS. "Unreduced gametes (gametes with the somatic chromosome number) are known to facilitate polyploid formation. Unreduced gametes result from a plethora of different mechanisms across different taxa, suggesting that the ability to produce unreduced gametes has evolutionary utility." https://lnkd.in/eSsUn-Y View in LinkedIn

EVOLUTIONARY SUBSTRATE. "Heritable genetic variation for unreduced gamete production has been observed, thereby providing an evolutionary substrate. Unreduced gametes are also frequently involved in interspecific hybridisation events as well as being produced by interspecific hybrids, facilitating allopolyploidisation." https://lnkd.in/eSsUn-Y View in LinkedIn