GENETIC DIVERSITY IN A AND B LINES BASED ON TRAITS INFLUENCING OUTCROSSING IN RICE (ORYZA SATIVA L.)

Published on Oct 12, 2019 10:32 AM

Seventeen pairs of CMS (A) and maintainer (B) lines were evaluated for fifteen traits (both
floral and morphological) influencing outcrossing in rice. Considerable variation exhisted
in the population for all the traits. Blines had bigger anthers, greater plant height and early
flowering whereas A lines were characterized by pronounced stigmatic traits, longer
duration of anthesis and poor panicle exsertion. Male sterility followed by source sterile
cytoplasm and geographical diversity were the main factors responsible for the diversity.
V20 A can be used as potential source of sterile cytoplasm. Some Punjab male sterile line
(PMS) were found promising but need improvement in panicle exsertion. Seven clusters
were formed and these clusters can be utilised to identify and develop CMS lines with good
outcrossing ability.
 

Keywords: CMS lines, floral morphology, outcrossing, genetic diversity, rice.

Info

Year: 1996
Volume: 56
Issue: 4
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

Authors

K. V. SEETHARAMAIAH, R. S. KULKARNI, M. MAHADEVAPPA, T. G. PRASAD AND M. GOPINATHA RAO info_circle

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