Results 181 to 190 of about 98,251 (218)

Effect of insect pollinator on inbreeding versus outbreeding in open pollinated strawberry seeds

Scientia Horticulturae, 2017
Abstract In Japan, honey bees, bumble bees, and flies are used in strawberry production to produce normally shaped fruits. These insects may determine the inbreeding or outbreeding of strawberry flowers. Whole-genome DNA of the strawberry cultivar ‘Shizutakara’ showed no amplification of DNA fragments when PCR was performed with a F3H CAPS DNA marker.
Tomohiro Yanagi, Hiroto Miura, Sachiko Isobe, Nobuyuki Okuda, Yuichi Yoshida   +4 more
openaire   +1 more source

Population Improvement and Development of Open-Pollinated Varieties

2017
Population improvement is usually done by recurrent selection, a procedure that generally involves three basic stages of field work: development of progenies from the population being improved, evaluation of the progenies in field trials and selection of a certain percentage of the progenies based on their top performance, and recombination of the ...
Baffour Badu-Apraku, M. A. B. Fakorede
openaire   +1 more source

A comparison of genetic information from open-pollinated and control-pollinated progeny tests in two eucalypt species

Theoretical and Applied Genetics, 1996
Genetic-parameter estimates and parental breeding-value predictions were compared from open-pollinated and control-pollinated progeny populations of Eucalyptus globulus and two populations of E. nitens. For E. globulus there were two types of open-pollinated populations (native stand open-pollinated and seed orchard open-pollinated) and two types of ...
G R, Hodge, P W, Volker, B M, Potts, J V, Owen   +3 more
openaire   +2 more sources

Inter-Population Hybrids in Open-Pollinated Varieties of Maize

The American Naturalist, 1957
Crosses between three open-pollinated varieties of maize exhibit heterosis in yield in the F1 generation and the F2 performance is intermediate between parents and F1. These findings are in contrast to those in Drosophila where the F2 has been found equal or inferior to parent strains in characters relating to fitness and they have been interpreted as ...
Edward Pollak, H. F. Robinson, R. E. Comstock   +2 more
openaire   +1 more source

Diallel study of open-pollinated maize varieties in Trinidad

Euphytica, 1996
In Trinidad, maize (Zea mays L.) is primarily harvested in the immature stage as green ears for human consumption. The purchase of popular imported hybrid seed has become a substantial component of the economic inputs of maize production. The objectives of this study were to investigate combining abilities and heterotic patterns among available open ...
D. Spaner, R. A. I. Brathwaite, D. E. Mather   +2 more
openaire   +1 more source

Early Genetic Evaluation of Open-Pollinated Douglas-Fir Families

Forest Science, 1987
Abstract In a test of early genetic evaluation of the growth potential of 14 families of open-pollinated Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco), measures of growth and phenology of seedlings grown in a coldframe were correlated with height of saplings in evaluation plantations at 9, 12, and 15 years.
Kurt H. Riitters, David A. Perry
openaire   +1 more source

Breeding Open-Pollinated, Hybrid and Transgenic Outcrossing Species

2015
At least 50 % of crops are outcrossing species whose reproductive system includes devices promoting it. These species exhibit mild to severe inbreeding depression and significant heterosis. There are composite, hybrid, and synthetic cultivars of outcrossing species.
openaire   +1 more source

Chromatographic Analysis of an Open-pollinated Rosendahl Spruce Progeny

Canadian Journal of Forest Research, 1975
Chromatographic evaluation of foliage extracts from 25 white spruce, 25 black spruce, Rosendahl spruce, and 61 open-pollinated progeny of Rosendahl spruce provided additional evidence of the hybrid origin of Rosendahl spruce. Individual trees were scored on the basis of the presence or absence of spots indicating flavanoid compounds. The score for the
Don Riemenschneider, Carl A. Mohn
openaire   +1 more source

Open-Pollinated and Synthetic Cultivars from Population Improvement

2016
Population improvement leading to open-pollinated or synthetic cultivars is a natural choice of breeding programme for out-breeding seed propagated crops. Construction of a foundation population is discussed. Predicted responses to mass selection and to half-sib, full-sib and S1 family selection are derived.
openaire   +1 more source

The Composition of an Open Pollinated Segregating Cotton Population

The American Naturalist, 1956
(1) By analysing the open pollinated progeny from a segregating population of cotton whose initial composition in respect of four marker genes is known, it has been possible to estimate separately the relative frequency of three types of pollination: (a) The proportion of apparent out-pollination (AOP), i.e. "foreign" pollination. (b) The proportion of
openaire   +1 more source