Results 231 to 240 of about 34,704 (266)

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
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The Development of Self‐Pollinated Inbred Lines of Meadowfoam by Direct Selection in Open‐Pollinated Populations

Crop Science, 1997
Limnanthes alba Benth. (meadowfoam) is an allogamous insectpollinated oilseed crop. Poor pollination and pollinator costs have purportedly limited the commercial production of this crop. Production costs can be reduced and seed yields might be increased by using self‐pollinated cultivars.
Steven J. Knapp, Jimmie M. Crane
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Theory and application of open-pollination and polycross in forage grass breeding

Theoretical and Applied Genetics, 1990
Progeny testing and selection of forage grasses by means of growing half-sib (HS) families from openpollination and polycross have been considered from theoretical and practical points of view. Special attention has been paid to the genetic variation within half-sib families, which is expected to be large as compared to the genetic variation between ...
A H, Aastveit, K, Aastveit
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CHARACTERIZATION OF ARTICHOKE OPEN POLLINATED AND HYBRID CULTIVARS BY PROTEIN ELECTROPHORESIS

Acta Horticulturae, 2005
Abstract: Little research-based information is available on artichoke (Cynara cardunculus L. subsp. scolymus Hayek) genetic variability achieved by biochemical and molecular markers. Studies on artichoke cultivars characterization by achene proteins analysis are unknown. The pattern of achene proteins, assessed by sodium dodecyl sulphate polyacrylamide
Sergio L, Di Venere D, Cardinali A, Bianco V V   +3 more
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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
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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
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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
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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
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CropPol: a dynamic, open and global database on crop pollination

2022
Seventy five percent of the world's food crops benefit from insect pollination. Hence, there has been increased interest in how global change drivers impact this critical ecosystem service. Because standardized data on crop pollination are rarely available, we are limited in our capacity to understand the variation in pollination benefits to crop yield,
Allen‐Perkins, Alfonso, Magrach, Ainhoa, Dainese, Matteo, Garibaldi, Lucas A., Kleijn, David, Rader, Romina, Reilly, James R., Winfree, Rachael, Lundin, Ola, McGrady, Carley M., Brittain, Claire, Biddinger, David J., Artz, Derek R., Elle, Elizabeth, Hoffman, George, Ellis, James D., Daniels, Jaret, Gibbs, Jason, Campbell, Joshua W., Brokaw, Julia, Wilson, Julianna K., Mason, Keith, Ward, Kimiora L., Gundersen, Knute B., Bobiwash, Kyle, Gut, Larry, Rowe, Logan M., Boyle, Natalie K., Williams, Neal M., Joshi, Neelendra K., Rothwell, Nikki, Gillespie, Robert L., Isaacs, Rufus, Fleischer, Shelby J., Peterson, Stephen S., Rao, Sujaya, Pitts‐Singer, Theresa L., Fijen, Thijs, Boreux, Virginie, Rundlöf, Maj, Viana, Blandina Felipe, Klein, Alexandra‐Maria, Smith, Henrik G., Bommarco, Riccardo, Carvalheiro, Luísa G., Ricketts, Taylor H., Ghazoul, Jaboury, Krishnan, Smitha, Benjamin, Faye E., Loureiro, João, Castro, Sílvia, Raine, Nigel E., Groot, Gerard Arjen, Horgan, Finbarr G., Hipólito, Juliana, Smagghe, Guy, Meeus, Ivan, Eeraerts, Maxime, Potts, Simon G., Kremen, Claire, García, Daniel, Miñarro, Marcos, Crowder, David W., Pisanty, Gideon, Mandelik, Yael, Vereecken, Nicolas J., Leclercq, Nicolas, Weekers, Timothy, Lindstrom, Sandra A. M., Stanley, Dara A., Zaragoza‐Trello, Carlos, Nicholson, Charlie C., Scheper, Jeroen, Rad, Carlos, Marks, Evan A. N., Mota, Lucie, Danforth, Bryan, Park, Mia, Bezerra, Antônio Diego M., Freitas, Breno M.   +79 more
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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.
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