BGuILE is a learning environment in which students explore rich problem contexts in evolutionary biology and behavioral ecology. BGuILE uses domain-specific investigation models to scaffold students for the particular strategies experts use in these domains. These investigation models focus students on the relevant aspects of each domain, and support productive investigation strategies within t...

the combining ability of quantitative and qualititative traits has been studied quite frequently in rapeseed (brassica napus l.), but rarely at different nitrogen levels. twenty-one genotypes, including 6 parents and their 15 f2 diallel progenies, were evaluated at two nitrogen rates, n0 and n150. a combined analysis of variance revealed significant mean squares of general (gca) and specific (s...

Five upland cotton cultivars were crossed in a complete diallel crossing system to investigate inheritance pattern and combining ability of parents for different fiber quality traits like staple length, fiber strength, fineness and uniformity. The study was carried out in the Department of Plant Breeding and Genetics, University of Agriculture, Faisalabad during the years 2005-07. Highly signif...

Maize is a cereal crop essential to fulfill the need for food and support global security programs. hybrid varieties play very significant role in increasing maize production. Objectives of research were obtain tester, which consistent identifying inbred lines with high specific combining ability, prospective crossed-hybrids that have potential assembling be varieties. The grain yield showed ab...