in order to analyze general and specific combining abilities and gene effects in sunflower for some agronomic traits, five cms lines and four restorer lines (tester) were crossed in a line × tester scheme. hybrids were evaluated in a randomized complete block design with three replications in the agriculture research station, university of tabriz, in 2009 and 2010 growing seasons. plant height,...

Improvement of seed yield and oil content in safflower (Carthamus tinctorius L.) as an oilseed crop is the main objective of its breeding programs. However, little genetic information is available for these traits. The main objective of this study was to estimate genetic parameters for seed yield and oil content. Six safflower lines each derived from different Iranian local populations and Saff...

Stomach content analysis (SCA) and more recently stable isotope analysis (SIA) integrated with isotopic mixing models have become common methods for dietary studies and provide insight into the foraging ecology of seabirds. However, both methods have drawbacks and biases that may result in difficulties in quantifying inter-annual and species-specific differences in diets. We used these two meth...

Exotic germplasm, that is, germplasm without commercial applicability, can broaden the genetic base in upland cotton (Gossypium hirsutum L.). The objectives of this study were to determine combining ability and identify parents from exotic germplasm for breeding. Twelve regionally adapted exotic germplasm lines were crossed with one cultivar and three elite germplasm lines in a North Carolina D...

An efficient hybrid breeding program defines and utilizes a few heterotic groups. Objectives of this study were to determine genetic diversity alignment South Africa maize inbred lines collection towards tropical temperate testers. Forty-four genotyped with 56,110 single nucleotide polymorphism (SNP) markers. A total 40 crossed two line Due seed shortages, testcross hybrids containing 14 18 use...

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...

Salt stress is one of the most crucial abiotic factors and affects about 20 % world's irrigated land. The present study was conducted to evaluate combining effects salinity response at early seedling stage, (root length, coleoptile shoot germination rate vigour) using four parents their 4 x full-diallel crosses bread wheat. Parents F2 hybrids were assessed in laboratory under induced by sodium ...

The fungus Fusarium verticillioides infects maize (Zea mays L.) ears and kernels, resulting in Fusarium ear rot disease, reduced grain yields, and contamination of grain with the mycotoxin fumonisin. Hybrid maize breeding programs involve selection for both inbred and hybrid performance; the emphasis placed on inbred versus hybrid selection depends on heritability of and the genetic correlation...