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Cytogenetic Analysis of Interspecific Hybrids Between Common Bean and Scarlet Runner Bean 1
Author(s) -
Cheng S. S.,
Bassett M. J.,
Quesenberry K. H.
Publication year - 1981
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1981.0011183x002100010021x
Subject(s) - biology , meiosis , hybrid , pollen , anaphase , phaseolus , botany , interspecific hybridization , interspecific competition , interspecific hybrids , genetics , chromosome , gene
Meiotic analyses in F 1 hybrids between three lines of common bean, Phaseolus vulgaris L., and two lines of Scarlet runner bean, P. coccineus L., were conducted to study the degree of similarity between the two genomes. The quantitative data indicated that meiosis in the three F 1 hybrids studied was abnormal. At least two pairs of chromosomes were differentiated by inversions. Data on bridge and laggard frequencies taken from anaphase I and II pollen mother cells (PMCs) were interpreted to mean that cross‐over within these inverted segments was responsible for 20 to 40% of the 58 to 79% pollen abortion observed in the interspecific hybrids. The identical frequency of PMCs with bridgelaggards in anaphase I and II indicated that the inversions were located at the end of the differentiated chromosomes.