An experiment with mice was designed to test the relative efficiency of three selection methods that help to minimize the rate of inbreeding during selection. A common house mice (Mus musculus) population was selected for 17 generations to increase the weight gain between 21 and 42 days. The population was split at random into three lines A, B and C where three selection methods were applied: i...

The relevance of inbreeding depression to the persistence of plant populations can depend upon whether stress magnifies inbreeding depression for fitness-related traits. To examine whether drought stress exacerbates inbreeding depression in gas exchange traits and biomass, we grew selfed and outcrossed progeny of inbred lines from two populations of Impatiens capensis in a greenhouse experiment...

Drought is one of the major abiotic stresses affecting wheat yield. A recurrent selection program was conducted to improve the drought tolerance and yield of bread wheat using drought tolerant advanced breeding lines from a drought tolerant x susceptible cross (HI 1500 x HUW 510). The parental lines were evaluated for yield, biomass and harvest index (HI) in addition to the drought adaptive tra...

Pioneer species are essential for forest regeneration and ecosystem resilience. Pinus chiapensis is an endangered pioneer key species for tropical montane cloud forest regeneration in Mesoamerica. Human activities have severely reduced some P. chiapensis populations, which exhibited a small or null colonization potential suggesting the involvement of genetic factors associated with small popula...

The deleterious consequences of inbreeding, especially in the form of inbreeding depression, are well known. However, little is known about how inbreeding affects genome-wide gene expression. Here, we show that inbreeding changes transcription levels for a number of genes. Gene expression profiles of Drosophila melanogaster lines inbred to F approximately = 0.67 at different rates changed relat...

Estimations of population genetic parameters like allele frequencies, heterozygosities, inbreeding coefficients and genetic distances rely on the assumption that all sampled genotypes come from a randomly interbreeding population or sub-population. Here we show that small cross-generational samples may severely affect estimates of allele frequencies, when a small number of progenies dominate th...

To transfer multiple desirable alien genes into common wheat, we previously reported a new trigeneric hybrid synthesized by crossing a wheat - Thinopyrum intermedium partial amphiploid with wheat - Psathyrostachys huashanica amphiploid. Here, the meiotic behavior, chromosome constitution, and stripe rust resistance of F5 derivatives from the wheat - Th. intermedium - P. huashanica trigeneric hy...

Eucalyptus benthamii is an important species used in monoclonal and hybrid forest plantations around the world. Few natural populations of remain, as such it has been placed on list endangered species. We sampled 111 seeds from nine progenies across two provenances (Candói - progenies; Vale do Corisco seven progenies). Samples were genotyped using 19 microsatellite loci. A high number alleles (...

The production of green maize is considerable important for various regions Brazil. It vital that breeding programs public institutions seek to meet the needs this market sector, which has a relevant social role, mainly on small properties. aim study was estimate inbreeding depression and genetic components (m + d) characters associated with quality in three populations different basis: variety...