Heterosis refers to the phenomenon in which an F1 hybrid exhibits enhanced growth or agronomic performance. However, previous theoretical studies on heterosis have been based on bi-parental segregating populations instead of F1 hybrids. To understand the genetic basis of heterosis, here we used a subset of F1 hybrids, named a partial North Carolina II design, to perform association mapping for ...

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...

A complete diallel cross using eight flax genotypes including four Iranian breeding lines and four Canadian genotypes was carried out to estimate genetic parameters for days to flowering, days to maturity, plant height, primary branches per plant, number of capsules per plant, number of seeds per capsule, seed yield per plant, 1000-seed weight, seed yield and harvest index. Analysis of variance...

This study aimed to estimate the combining ability, of T. cacao genotypes preselected for drought tolerance through diallel crosses. The experiment was conducted under greenhouse conditions at the Cacao Research Center (CEPEC), Ilhéus, Bahia, Brazil, in a completely randomized block design, in an experimental arrangement 21 x 2 [21 complete diallel crosses and two water regimes (control and str...

Eight bread wheat genotypesof diverse origin were crossed in a half-diallel model in 2011/2012 season. The eight parents (Sahel-1 P1, Giza-168 P2, Misr-1 P3, Gemmieza-9 P4, Gemmieza-11 P5, Line-1 P6, Line-2 P7, Line-3 P8) and their 28 F1 hybrids were evaluated under normal and water stress conditions during 2012/2013 season in a two field experiments wereas designed a randomized complete block ...

Rice (Oryza sativa L.) breeding seeking to combine high productivity and cold tolerance for the temperate Latin America region is an important challenge. We estimated some useful parameters which can be used to investigate the genetic control of agronomic characters in crosses combining cold tolerance and productivity. A partial diallel design was used in crosses between six tropical indica ric...

The present study was conducted to evaluate the genetic architecture of five diverse maize genotypes using combining ability analyses. General (GCA) mean squares were non-significant for grain yield and its related components. Specific (SCA) highly significant yield, number grains per row cob girth while days tasseling, silking, plant height, height length. These studies suggested preponderance...

Cotton is very important crop regarding the global trade. It grown for its fiber and edible oil in Pakistan. contributes 1.5 percent to GDP 69 foreign exchange. There need enhance yield per unit area of cotton by developing high yielding stress tolerant varieties. In breeding program parents their crosses are selected on basis combining ability. Combining ability analysis performed identify gen...

A study was carried out to assess the combining ability of ten CMS lines with four testers using line x tester method. Biometrical observations were taken for days 50% flowering, plant height, head diameter, maturity, volume weight, hundred seed yield /plant, oil content and yield/plant.  Specific combing variance greater than general all characters which indicated that non-additive gene a...