Cassava breeding is a critical aspect of sustainable agriculture to address the challenges food security and climate change. The present study aimed assess combining ability six Thai cassava elite varieties for four key traits, including fresh root yield (FRY), shoot (FSY), harvest index (HI) starch content (SC) through an analysis diallel mating design over two years. Parental lines HB80 R5 sh...

Abstract The complete diallel cross is the only mating design that provides estimates of variance components general combining (GCA), specific ability (SCA), maternal and reciprocal effects, in addition to heritabilities genetic correlations. To obtain such estimates, diallels were made among 10 trees each three natural Norway spruce populations from altitude 300 500 m southern Norway. Seedling...

the identification of parental inbred lines to develop superior hybrids is a rather costly and time-consuming step in maize breeding. in some cases, pedigree information has been used to select diverse parental lines. in the case of iranian maize inbred lines, this information is not fully available. in this study we investigated the genetic distance (gd) based on simple sequence repeats (ssr) ...

Combining ability of inbred lines is the ultimate factor determining future usefulness for hybrid development while, an idea about nature gene action controlling yield and contributing characters important fruitful breeding programme. Owing to this, present study was carried out investigate General Ability (GCA) Specific (SCA) effect parental hybrids respectively, deduce type regulating grain i...

Combining ability analysis provides useful information for the selection of parents, in breeding program cucumber at Can tho, VietNam, as well related to nature and extent gene activities involved. Cucumberimprovement involves strategies enhance yieldpotential quality cucumber. Targeting improvement new varieties plants, combining abilities genetic parameters 12 traits estimated from full diall...

Upland cotton (Gossypium hirstum L.), which produces more than 95% of the world natural cotton fibers, has a narrow genetic base which hinders progress in cotton breeding. Introducing germplasm from exotic sources especially from another cultivated tetraploid G. barbadense L. can broaden the genetic base of Upland cotton. However, the breeding potential of introgression lines (ILs) in Upland co...

The relative magnitude of general combining ability (gca) and specific combining ability (sca) effects in three generations (years), viz. Seedling (SG), first clonal generation (FCG) and second clonal generation (SCG) for tuber yield, tuber number, average tuber weight and tuber dry matter of potato in a line x tester mating design (10 × 4) was studied. There were marked differences in the gca ...

Investigation was carried out to ascertain the genetic architecture for heat tolerance and yield components from diallel crosses in maize (Zea mays L.). The combining ability both normal stress conditions revealed highly significant mean squares due general (GCA) specific (SCA) direct reciprocal all characters except anthesis-silking interval condition of crosses. Estimate variance 13 higher SC...

Early maturity and genotype by environment interaction (GEI) have always been challenging concerns for breeders in selecting appropriate parents breeding programs. The presented study aimed to investigate early the dimension of gene action, as well as, assess performance half-diallel populations using eight advanced sweet corn inbred lines their 28 F1 hybrids with two commercial checks yield-re...

The inheritance of stress responsiveness (line effects and combining abilities) was phenotypically studied in progeny from diallel crosses of randombred (RB) quail and quail selected for exaggerated (high stress, HS) or reduced (low stress, LS) plasma corticosterone (CS) response to brief immobilization. The three genotypes were crossed in a 3 x 3 factorial arrangement of treatments that allowe...