Cytogenetics of Sterility in F2 Hybrids of Indica×Indica and Indica×Javanica Varieties of Rice (Oryza Sativa L.)

Abstract

Pollen and spikelet sterility in F2 populations of three indica×indica crosses and three indica×javanica crosses were studied. The most sterile of the F2 plants from three crosses were examined cytologically. The most common indications of structural hybridity at pachynema were loose pairing, partial pairing, and reciprocal translocations. Univalents, quadrivalents, aneuploid chromosome numbers, and fragments were observed at diakinesis and metaphase I in all three crosses. Unsplit bivalents, unequal or late disjunctions of chromosomes, laggards, and anaphase bridges were found at anaphase I and telophase I. Moreover, a variety of nonchromosomal aberrations was found at each meiotic stage. The wide array of meiotic aberrations suggests both structural hybridity and complex gene interactions. © 1975, Japan Mendel Society, International Society of Cytology. All rights reserved.

Source or Periodical Title

CYTOLOGIA

ISSN

114545

Page

639-647

Document Type

Article

This document is currently not available here.

Share

COinS