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MORPHOLOGY OF SACCHARUM‐SORGHUM HYBRID DERIVATIVES
Author(s) -
Gupta S. C.,
Wet J. M. J.,
Harlan J. R.
Publication year - 1978
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1978.tb06158.x
Subject(s) - sorghum , biology , saccharum , selfing , ploidy , pollen , hybrid , inflorescence , sweet sorghum , glume , botany , sorghum bicolor , backcrossing , chromosome , saccharum officinarum , agronomy , population , gene , genetics , demography , sociology
The intergeneric hybrid between sugarcane ( Saccharum sp.) and sorghum ( Sorghum bicolor (L.) Moench.) was produced by pollinating sugarcane inflorescences of clone F 36‐819 (2 n = ca. 112) with diploid (2 n = 20) ‘Rex’ sorghum pollen. The backcross four (BC 4 ) population, produced by back‐crossing twice with diploid and then twice more with tetraploid (2 n = 40) ‘Rio’ sorghum, combined 40 Sorghum and 4‐10 Saccharum chromosomes. Different BC 4 individuals were morphologically distinct within and between chromosome complexes, indicating that their genomes must comprise different combinations of Sorghum and Saccharum chromosomes. Selfing for one or more generations results in almost complete elimination of Saccharum chromosomes and morphologically modified sorghums are recovered. Modified sorghums have various combinations of Saccharum characteristics superimposed on a basic Sorghum morphology. The presence of Saccharum characters in some of the recovered sorghums with 2 n = 40 chromosomes indicates the potential for a gene transfer from sugarcane to sorghum.