Abstract
The importance of screening in a plant breeding program is discussed. A systematic classification of screening methods is proposed based on increasing order of difficulty.
Method I. Direct identification
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Ia.
Visual inspection involving gross morphological characters.
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Ib.
Direct inspection with automatic elimination of undesirables.
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Ic.
Visual observation utilizing biological organisms but without automatic elimination of undesirables.
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Id.
Visual observation of distinguishable physiological characters.
Method II. Screening procedures involving physical comparisons
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IIa.
Procedures based on linear measurements.
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IIb.
Procedures based on weighing.
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IIc.
Methods based on physical characteristics of plant parts.
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IId.
Methods based on physical characteristics of plant extracts.
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IIe.
Differential reaction to physical stresses.
Method III. Procedures involving chemical determinations
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IIIa.
Chemical spot test.
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IIIb.
Semi-quantitative chemical tests.
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IIIc.
Precise chemical testing.
Method IV. Indirect procedures involving biological testing
Method V. Combination methods
Other means are discussed of compressing time and space in plant breeding programs.
Samenvatting
De betekenis van selectiemethoden toegepast in veredelingsprogramma's wordt besproken. Een classificatie wordt gegeven op grond van toeneming van de moeilijkheden. De volgende methoden worden geanalyseerd.
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1.
Directe identificatie van gewenste of ongewenste planten.
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2.
Selectiemethoden welke gebaseerd zijn op lengte, gewicht of andere kenmerken.
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3.
Selectiemethoden gebaseerd op chemische bepalingen.
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4.
Indirecte methoden, waarbij een biologische toetsing noodzakelijk is.
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5.
Gecombineerde methoden.
Tenslotte worden middelen besproken om tijd en ruimte te besparen.
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Additional information
Published with the approval of the Director of the Hawaii Agricultural Experiment Station as Miscellaneous Paper No. 126.
Associate Agronomist, Hawaii Agricultural Experiment Station, Honolulu 14, Hawaii.
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Britten, E.J. A proposed classification of screening methods for plant breeding programs. Euphytica 9, 293–303 (1960). https://doi.org/10.1007/BF00029481
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DOI: https://doi.org/10.1007/BF00029481