caa a22 4500 477135528 CHVBK 20180405111716.0 cr unu---uuuuu 170330e19970601xx s 000 0 eng 10.1023/A:1003008617829 doi (NATIONALLICENCE)springer-10.1023/A:1003008617829 A geographical approach to identify phosphorus-efficient genotypes among landraces and wild ancestors of common bean [Elektronische Daten] [Stephen Beebe, Jonathan Lynch, Nicholas Galwey, Joseph Tohme, Ivan Ochoa] Cultivars of common bean (Phaseolus vulgaris L.) capable of yielding well at low levels of native or added phosphorus (P) are highly desirable in many tropical production systems. The objective of the present study was to identify geographical regions which might be sources of such genotypes. A total of 364 landraces, cultivars and wild genotypes, drawn from a broad geographic range, were divided on the basis of growth habit into four field trials, each comprising two levels of P, stressed and unstressed, on an infertile Andosol in Popayan, Colombia. The regression relationship between grain yield per plant in the presence and in the absence of stress was determined, and each genotype's deviation from this relationship was used as a measure of P-efficiency. There was highly significant variation in efficiency among genotypes in all growth habits, and in climbing beans there were consistent regional differences, superior genotypes being identified with greater frequency among those from Bolivia, West Mexico and South Mexico-West Guatemala. The latter region was promising for prostrate bush genotypes also. Wild beans in general performed relatively poorly; it appears that P-efficiency traits in P. vulgaris have been acquired during or after domestication. These results confirm that genetic differences in P-efficiency exist among common bean genotypes and suggest that these are related to geographic origin. Furthermore, the use of a representative sample of germplasm can help to identify segments of the gene bank that are especially promising as sources of desirable traits. Kluwer Academic Publishers, 1997 common bean nationallicence genetic resources nationallicence Phaseolus vulgaris nationallicence phosphorus nutrition nationallicence plant adaptation nationallicence stress tolerance nationallicence variation nationallicence Beebe Stephen Centro Internacional de Agricultura Tropical (CIAT), A.A. 6713, Cali, Colombia aut Lynch Jonathan Department of Horticulture, The Pennsylvania State University, 16802, University Park, PA, U.S.A aut Galwey Nicholas Department of Horticulture, The Pennsylvania State University, 16802, University Park, PA, U.S.A aut Tohme Joseph Centro Internacional de Agricultura Tropical (CIAT), A.A. 6713, Cali, Colombia aut Ochoa Ivan Cenipalma, A.A. 42555, Santafe de Bogota, Colombia aut Euphytica Kluwer Academic Publishers 95/3(1997-06-01), 325-338 0014-2336 95:3<325 1997 95 10681 https://doi.org/10.1023/A:1003008617829 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1003008617829 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Beebe Stephen Centro Internacional de Agricultura Tropical (CIAT), A.A. 6713, Cali, Colombia aut NATIONALLICENCE 700 1- Lynch Jonathan Department of Horticulture, The Pennsylvania State University, 16802, University Park, PA, U.S.A aut NATIONALLICENCE 700 1- Galwey Nicholas Department of Horticulture, The Pennsylvania State University, 16802, University Park, PA, U.S.A aut NATIONALLICENCE 700 1- Tohme Joseph Centro Internacional de Agricultura Tropical (CIAT), A.A. 6713, Cali, Colombia aut NATIONALLICENCE 700 1- Ochoa Ivan Cenipalma, A.A. 42555, Santafe de Bogota, Colombia aut NATIONALLICENCE 773 0- Euphytica Kluwer Academic Publishers 95/3(1997-06-01), 325-338 0014-2336 95:3<325 1997 95 10681 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer