Open AccessCytological Studies in Digitaria pentzii Stent
Author(s) -
K. G. Shambulingappa
Publication year - 2020
Publication title -
the journal of agriculture of the university of puerto rico
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.123
H-Index - 10
eISSN - 2308-1759
pISSN - 0041-994X
DOI - 10.46429/jaupr.v54i2.11102
Subject(s) - digitaria , ploidy , biology , metaphase , chromosome , chromosome number , chromosomal translocation , chromatin , botany , genetics , karyotype , dna , gene
Fourteen accessions of Digitaria pentzii have been studied cytologically: Ten of them are tetraploids, two are triploids, one is a diploid and one is a aneuploid. Observations made on chromosome configurations at diakinensis and metaphase 1 in polyploids, together with preliminary studies on gross morphology of pachytene chromosomes, indicate that the tetraploids are allopolyploids and the triploids are autopolyploids. Elimination of chromatin material through B-chromosome process following translocation is cited as one of the mechanisms for the occurrence of aneuploids.
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