Summary
Homozygous and heterozygous Phaseolus vulgaris and P. acutifolius parental genotypes were hybridized to determine if genotypic diversity would aid gene transfer between these species. Certain P. vulgaris female parents resulting from diverse intraspecific crosses increased the frequency of species hybrids obtained. From a total of 19 self-sterile hybrids, 20 backcross-1 (BC1) lines (P. vulgaris recurrent parent) were produced from 4 partially female-fertile hybrids, each of which had a heterozygous P. vulgaris female parent. Heterozygous P. acutifolius male parents did not influence the frequency at which interspecific hybrids could be produced but apparently improved female-fertility. Fertility of the F1BC1 generation was highly variable. The frequency of fertile individuals increased in each subsequent backcross generation (F1BC2 and F1BC3).
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Purdue University Agricultural Experiment Station Publication Δ 9946.
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Pratt, R.C., Bressan, R.A. & Hasegawa, P.M. Genotypic diversity enhances recovery of hybrids and fertile backcrosses of Phaseolus vulgaris L. × P. acutifolius A. Gray . Euphytica 34, 329–334 (1985). https://doi.org/10.1007/BF00022926
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DOI: https://doi.org/10.1007/BF00022926