Heterosis is a widespread phenomenon corresponding to the increase in fitness following crosses between individuals from different populations or lines relative to their parents. Its genetic basis has been a topic of controversy since the early 20 th century. The masking of recessive deleterious mutations in hybrids likely explains a substantial part of heterosis. The dynamics and consequences ...

Diallel analysis was used to obtain information on combining ability, heterosis, estimates of genetic distances by random amplified polymorphic DNA (RAPD) and on their correlations with heterosis, for the popcorn varieties RS 20, UNB2, CMS 43, CMS 42, Zélia, UEM J1, UEM M2, Beija-Flor, and Viçosa, which were crossed to obtain all possible combinations, without reciprocals. The genitors and the ...

Heterosis is an important phenomenon for high-yield crop breeding and utilized F1 varieties in horticultural crops. However, its molecular mechanism has not been elucidated, compared to cereals, heterosis less explored at the level In this review, we compiled new genetic epigenetic studies on Because of difficulty predicting from parental distance, approaches are being used study basis Transcri...

The experiment was conducted with 60 hybrids developed by crossing two male sterile lines 30 diverse testers studied for gene action and heterosis. ANOVA combining abilities  revealed that the parents are significantly different all traits under study. ratio of gca:sca variance found less than unity indicating presence non-additive average degree dominance greater indicated predominance ov...

data on 361 lambs of mehraban (n=90), ghezel (n=92), ghezel × mehraban (n=87), and mehraban × ghezel (n=92, sire breed listed first) were used to estimate individual heterosisfor lamb growth. the obtained results demonstrated that lambs of purebreds of ghezel and mehraban showed the highest and the lowest birth weight, respectively (p

Heterosis, the phenomenon where hybrid offspring exhibit superior traits compared to their inbred parents, has captivated scientists for decades due its immense potential crop improvement. Unravelling molecular basis of heterosis remained a challenge, but recent advancements in genomic and techniques have shed new light on this intriguing phenomenon. This review paper provides comprehensive ove...

ferent breed makeups. It is widely used in commercial beef production because of the benefits it has to offer cow-calf producers. Improvements in efficiency can be dramatic if appropriate breed combinations are used. Crossbreeding does not eliminate the need for outstanding purebred cattle since efficient systems require well characterized, superior purebred cattle. Crossbreeding in beef cattle...

The present investigation was conducted to assess the magnitude of heterosis rabi sorghum (Sorghum bicolor (L.) Moench) developed by crossing four lines and twelve testers (in a line × tester design) produce 48 F1 cross combinations at Sorghum Improvement Project, MPKV., Rahuri, Maharashtra. To identify high-yielding Rabi hybrids, promising hybrids were sorted out based on positive significant ...

number of studies have shown that the manifestation of heterosis may be A dependent on physical and biotic environments. DOBZHANSKY et al. (1955) found that Drosophila pseudoobscura heterozygous for genes on the second chromosome was, in general, superior to homozygotes in viability. The relative viabilities of homozygotes and heterozygotes changed, however, with varying temperatures and with d...

the diallel cross design is frequently utilized to obtain information on genetic effects, estimates of general and specific combining ability (gca and sca) and to identify promising heterotic combinations as well as heterotic patterns. in the present study, heterotic crosses were identified for specific alkaloids in opium poppy (papaver somniferum l.) following yan’s gge biplot model by use of ...