Indian Society of Genetics & Plant Breeding

Effects of male sterility inducing cytoplasm on morpho physiological and biochemical characters in rice (Oryza sativa L.)

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Three sets of Ax R (AF1) and B x R (BF1) hybrids were
evaluated to study the influence of male sterility inducing
(WA) cytoplasm on various morpho-physiological and
biochemical characters in rice (Oryza sativa L.). The nature
and magnitude of cytoplasmic effects varied with character
and cross combination. The cytoplasm negatively
influenced plant height, spikelet fertility, average panicle
weight, 1000-grain weight, biomass yield, harvest index
and grain yield, while enhancing number of productive
tillers and growth duration. The cytoplasm negatively
influenced physiological characters like eGR, RGR, NAR,
LAI and LAD and biochemical characters like a-amylase
activity in germinating seeds and nitrate reductase activity
at various stages of crop growth. It could be feasible to
reduce or overcome the negative effects of cytosterility
by choosing appropriate parental lines.

Keywords: Rice, WA cytoplasm, sterile cytoplasm, effect on physiolgical and biochemical characters


Year: 2002
Volume: 62
Issue: 4
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906



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