Segregation and Recombination in Inter-Gene Pool Crosses of Phaseolus vulgaris L
نویسندگان
چکیده
Variation for segregation ratios and recombination rates was analyzed in crosses involving 13 common bean (Phaseolus vulgaris L.) genotypes from different gene pools and races. The segregation of RFLP, isozyme, and phaseolin markers belonging mostly to linkage groups D5 and D7 was analyzed in 11 F2 populations derived from Middle American x Andean, and Andean x Andean crosses. An average level of 10.4% segregation distortion for RFLPs was observed compared with 19.2% for isozyme markers. Preferential transmission of Middle American alleles was detected in crosses between the two gene pools. Levels of recombination were highly variable among a subset of four of the 11 F2 populations analyzed. These data, and comparisons with data published previously, suggest that recombination in common bean is under genetic control, although environmental factors may also affect it.
منابع مشابه
Evidence for Introduction Bottleneck and Extensive Inter-Gene Pool (Mesoamerica x Andes) Hybridization in the European Common Bean (Phaseolus vulgaris L.) Germplasm
Common bean diversity within and between Mesoamerican and Andean gene pools was compared in 89 landraces from America and 256 landraces from Europe, to elucidate the effects of bottleneck of introduction and selection for adaptation during the expansion of common bean (Phaseolus vulgaris L.) in Europe. Thirteen highly polymorphic nuclear microsatellite markers (nuSSRs) were used to complement c...
متن کاملPunctuated Distribution of Recombination Hotspots and Demarcation of Pericentromeric Regions in Phaseolus vulgaris L.
High density genetic maps are a reliable tool for genetic dissection of complex plant traits. Mapping resolution is often hampered by the variable crossover and non-crossover events occurring across the genome, with pericentromeric regions (pCENR) showing highly suppressed recombination rates. The efficiency of linkage mapping can further be improved by characterizing and understanding the dist...
متن کاملGenetic control of orange hilum corona of carioca beans (Phaseolus vulgaris)
The purpose of this research was to elucidate the genetic control of orange corona color in carioca common beans (Phaseolus vulgaris). We made four crosses between carioca group cultivars that differed in respect to the presence or absence of an orange hilum corona color. The F2, F3, F1BC11, F1BC21, F2BC11 and F2BC21 phenotypic segregations were evaluated with a chi-square test which fitted wit...
متن کاملInheritance of a Gene Conditioning Blotchy Root Color in Table Beet ( Beta vulgaris L . )
brid populations. J Hered 75:45-50. Mejla-Jimenez A, Munoz C, Jacobsen HJ, Roca WM, and Singh SP, 1994. Interspecific hybridization between common and tepary beans: Increased hybrid growth, fertility, and efficiency of hybridization through recurrent and congrulty backcrosslng. Theor Appl Genet 88: 324-331. Mildas PN, Rosas JC, Beaver JS, Telek L, and Freytag GF, 1994. Field performance o( sele...
متن کاملUni-2—A Dominant Mutation Affecting Leaf Development in Phaseolus vulgaris
Uni-2, a dominant mutation that affects leaf development in Phaseolus vulgaris, is described. The mutant type is characterized by the production of unifoliolate true leaves as opposed to the trifoliolate true leaves that characterize the wild-type phenotype of this species. Segregation data from the F2, F3, and F4 generations of crosses between the unifoliolate mutant and trifoliolate genotypes...
متن کامل