The combination of cytoplasmic male sterility (CMS) in one parent and a restorer gene (Rf) to restore fertility in another are indispensable for the development of hybrid varieties. To genotype rice lines at the restoring fertility (Rf) loci, 38 lines were crossed with a sterile tester (rfrf) line. Pollen fertility test was performed to identify sterile and fertile F1 hybrids. Seven lines were ...

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...

1. Presenting lower and upper bounds on the complexity of testing Bipartitness; specifically, we present a poly(1/ǫ) · Õ( √ k)-time tester, and an Ω √ k) lower bound on the query complexity of any tester for Bipartitness. 2. Reviewing a quasi-poly(1/ǫ)-time tester for Planarity. The result extends to testing any minor-closed property (i.e., a graph property that is preserved under the omission ...

It is adaptive to remember animates, particularly animate agents, because they play an important role in survival and reproduction. Yet, surprisingly, the role of animacy in mnemonic processing has received little direct attention in the literature. In two experiments, participants were presented with pronounceable nonwords and properties characteristic of either living (animate) or nonliving (...

In order to study the tribological properties of different hydraulic oils under motion modes, four-ball tester and block-on-ring were used optimize test parameters evaluate performance commercial oils. The results showed that optimized methods form point line modes can better extreme pressure anti-wear oi. There was a negatively correlation between performance; this method provide basis for rea...

Combining ability in forage sorghum [Sorghum bicolor (L.) Moench] was not as much investigated as in grain sorghum. In the present study, 4 local stocks (Testers) and 7 exotic stocks in A3 cytoplasm were crossed in line x tester fashion to investigate combining ability in forage sorghum. The hybrids and their parents were evaluated across two years (2002 2003) and at two locations in Khartoum S...