Tree breeders use traits of economic interest as productivity, stem form and wood quality, to select individuals for advanced generations. We determined the genetic control growth volume, tree height diameter, resistance, calculated a selection index Pinus maximinoi P. tecunumanii, selected were used establish seedling seed orchard (SSO). The largest gain obtained in SSO was 21.48% while tecunu...

introduction cr-39 detectors are widely used for radon and progeny measurement in the air. in this paper, using the monte carlo simulation, the possibility of using the cr-39 for direct measurement of radon and progeny in water is investigated. materials and methods assuming the random position and angle of alpha particle emitted by radon and progeny, alpha energy and angular spectrum that arri...

For the wide adoption of soybean varieties, it is desirable, that they are Kunitz trypsin inhibitor (Kti) free and resistant to yellow mosaic disease (YMD). The variety SL525 with YMD resistance was crossed susceptible NRC101 a null kti allele. F5 progeny derived from cross screened two simple sequence repeat (SSR) markers (satt409 satt322) linked allele resistance, respectively, one allele-spe...

Cocoa in Ecuador is one of the main crops economic importance, mainly for small and medium farmers on coast. Sexual self-compatibility most important criteria selection clonal plants from members hybrid progeny. Trees with higher levels are those that tend to produce earlier compared self-compatible ones. The study consisted selecting 333 trees a group 71 progenies, based such as productivity h...

An experiment was carried out to compare half-sib and full-sib progeny selection methods in Indian mustard (Brassica juncea L.) under rainfed conditions from 2006-07 to 2009-10 for 14 morpho-physiological characters. Full-sib and half-sib progenies were developed from different populations. The values of genetic parameters were higher in full-sibs compared to half-sibs for a greater number of t...

The objective of this study was to examine the health and meat production of cloned sows and their progenies in order to demonstrate the application of somatic cell cloning to the pig industry. This study compared the growth, reproductive performance, carcass characteristics and meat quality of Landrace cloned sows, F1 progenies and F2 progenies. We measured their body weight, growth rate and f...

One of the most controversial debates in evolutionary biology concerns the fitness consequences of female choice in nature. Discriminating females may benefit from high-quality territories and/or sires with high-quality genes. Here we experimentally dissociate female preferences for high-quality territories and male body size in a wild population of side-blotched lizards, Uta stansburiana. Fema...

As part of on-going efforts to use eco-friendly alternatives to chemical pesticides, methanol crude extracts of Plectranthus glandulosus and Callistemon rigidus leaves were sequentially fractionated in hexane, chloroform, ethyl acetate, and methanol to establish the most active fraction(s) against Callosobruchus maculatus in cowpea. Cowpea seeds (25 g) were treated with 0.5, 1, 2, and 4 g/kg of...

The limited number of papaya varieties available reflects the narrow genetic base of this species. The use of backcrossing as a breeding strategy can promote increases in variability, besides allowing targeted improvements. Procedures that combine the use of molecular markers and backcrossing permit a reduction of the time required for introgression of genes of interest and appropriate recovery...

Blood selenium concentration at birth and growth from birth through finishing were analyzed on progeny from two birth years of Angus bulls of United States (US) or New Zealand (NZ) origin. Dams of the calves were Polled Hereford x Angus crossbreds whose sires had been selected divergently from the national sire summary to be superior (+) or inferior (-) for yearling weight EPD (G) and for total...