To evaluate superior hybrid combinations, biometric techniques based on the quantification of heterosis as in the diallel analyses and predictive procedures are commonly being used. Diallel analyses have the disadvantage of requiring the evaluation of each parent in all possible combinations, which may be impossible in the case of studies involving many parents. The predictive methods which dis...

A diallel cross is a set of all possible matings between several genotypes, which may be individuals, clones, homozygous lines, etc. Such crosses are used to estimate general and specific combining abilities of lines and crosses respectively. For ‘n’ inbreed lines, the possible F1’s are n(n–1)/2, which are to be tested in a suitably replicated randomized design. With facilities available for te...

The study was conducted for the first season of 2020 in field College Agriculture \ Diyala University which seeds generation F1 hybrids were produced six strains that selected according to genetic distance among them and resulted 15 by applying half diallel crossing program. In second year, individual planted with their parents a hybrid Commercial common boob cat comparison within experiment ev...

The robustness of universal optimal binary balanced block (BBB) designs for diallel crosses has been investigated for the loss of any t (~1) observations (crosses) in a single block as per connectedness and A-efficiency criteria. It is observed that all the BBB designs for diallel crosses with the minimum eigenvalue strictly greater than 2 are robust as per connectedness criterion. Further A-ef...

Eight winter rapeseed genotypes GA096, Geronimo, Okapi, Orient, Sunday, Zarfam, SW0756, and Modena were used as parents of a complete diallel mating design. A set of 56 diallel F1 hybrids (with reciprocals) including their parents were evaluated in a 8×8 simple lattice design with two replications during 2007/08. Several agronomic traits like Plant height, number of lateral branches per pod, nu...

Parent-of-origin effects have long been recognized and exploited in plant breeding genetic studies. These can be conferred by preferential expression of an allele from one parent, organellar effects, or altered organellar-nuclear interaction. The goal this work was to evaluate parent-of-origin on seed, cotyledon, early growth traits cucumber using a full eight-by-eight diallel crossing two doub...

Plant breeding aims to develop cultivars with good agronomic traits through gene recombination and elite genotype selection. To support Coffea arabica programs assist parent selection, molecular characterization, genetic diversity (GD) analyses, circulating diallel studies were strategically integrated new cultivars. Molecular markers used assess the GD of 76 candidate parents verify crossing p...

A comparison among two forms of half-diallel analysis was made. The different half-diallel techniques used were Griffing's model I, method 2 and 4. These methods of diallel analysis were found to be interrelated. However, as Griffing's model I, method 4 partitioned heterosis into different components as well as gave information about combining ability and this method had certainly some advantag...