Plant Genome II Conference
Town & Country Conference Center, San Diego, CA, January, 1994.
PG-II: A GENETIC MAP OF COMMON BEAN TO LOCALIZE SPECIFIC RESISTANCE
GENES AGAINST ANTHRACNOSE
A GENETIC MAP OF COMMON BEAN TO LOCALIZE SPECIFIC RESISTANCE
GENES AGAINST ANTHRACNOSE.
Anne-Francoise Adam-Blondon, Mireille Sevignac, Michel Dron,
Biologie moleculaire vegetale, Bat. 430, Universite Paris-Sud,
91405 Orsay-cedex, France.
One hundred and fifty-three molecular markers (51
restriction fragment length polymorphism, 90 random amplified
polymorphic DNA, two sequence characterized amplified regions)
were used to construct a genetic map covering 571.5cM of the bean
genome. Two resistance genes towards anthracnose (Are and RVI),
a dominant gene for nuclear male-sterility (Ms8) and a pod
architecture character (Sgou) were also localized. This map was
established by using two backcross populations (BC1) of 82 and 46
individuals, derived from a cross between two european bean
cultivars: EO2 and Corel. Seven percent of the markers showed
distortions of segregation and mapped to three regions. Clusters
involving two to ten markers were observed in every linkage
group. The possible origin of these clusters is discussed.
Eighteen common markers to an already reported bean linkage map
(GEPTS, P., NODARI, R., TSAI, S.M., KOINANGE, R.M.K., LLACA, V.,
GILBERTSON, R. and GUZMAN, P. 1993. Linkage mapping in common
bean. Annu. Rept. Bean Improv. Coop., 36: 24-38) allowed to
establish a preliminary correspondence between the two maps. The
establishment of an integrated bean map and some applications of
such a map are discussed.
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