Indian Society of Genetics & Plant Breeding

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A PARTIAL MALE STERILE RICE PLANT (ORYZA SATIVA L.) - CYTOGENETICS OF MULTIVALENT CHROMOSOMAL ASSOCIATIONS

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A partial male sterile plant of spontaneous origin was isolated from a traditional tall rice
variety Singhawar. The cytological observations of male sterile plant suggested that
chromosomal irregularities such as abnormal chromosome number, chromos0l1!es not
arranged properly at metaphase plate, chromosomal fragments at pollen mitosis, and high
frequency of quadrivalents (ltv + 1011, 2rv + 811 and 31v + 611) and trivalent associations in
meiocytes probably caused male sterility. The multivalent associations combined with
aneuploidy in the pollen mother cells of selfed progenies caused high pollen sterility.
 

Keywords: Rice male sterility, multivalents, cytogenetics.

Info

Year: 1996
Volume: 56
Issue: 1
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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