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EFFECT OF CYTOPLASM ON FRUIT YIELD AND ITS ATTRIBUTES AND RESPONSE TO ANTHRACNOSE RESISTANCE IN CHILLI (Capsicum annuum L.)

KrishiKosh

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Title EFFECT OF CYTOPLASM ON FRUIT YIELD AND ITS ATTRIBUTES AND RESPONSE TO ANTHRACNOSE RESISTANCE IN CHILLI (Capsicum annuum L.)
 
Creator HARITHA, BOLLINEDI
 
Contributor Mohan Rao, A
 
Subject ---
 
Description Considering that male sterile inducing cytoplasm of the hybrids is
associated with susceptibility to biotic stresses as evidenced by
devastation of Texas cytoplasm-based corn hybrids due to the outbreak
of southern leaf blight, commercialization of cytoplasmic-nuclear male
sterile (CMS) hybrids in chilli would be justified if CMS hybrids offer
additional benefits either in terms of improved performance or they are
comparable to conventional hybrids specially for defense traits. Under
this premise, an investigation was carried out at the Experimental Plots,
‘K’ Block and Hot Pepper Improvement Unit, Department of Genetics &
Plant Breeding, University of Agricultural Sciences, GKVK, Bengaluru
during 2010 dry and rainy seasons, to assess the cytoplasmic effects in
terms of parental gca effects, hybrid mean performance, sca effects and
mid parent heterosis on fruit yield and its attributes and response to
anthracnose in chilli. Sixty iso-nuclear alloplasmic hybrids {synthesized
involving two CMS (A) lines, their counterpart fertile (B) lines and ten
restorer (R) lines} which included 20 each of A × R, B × R & R × B
crosses, were evaluated for fruit yield and its attributes and reaction to
anthracnose (as assessed by the size of the lesion caused by the
pathogen upon artificial infection following microinjection method using
Hamilton Micro Syringe). The significance or otherwise of differences
between pair-wise comparison among A × R, B × R & R × B crosses was
considered as evidence for cytoplasmic influence or otherwise,
respectively. Cytoplasmic influence on parental gca effects, hybrid mean
performance, sca effects and mid-parent heterosis varied with trait as
well as nuclear genetic background of the crosses. However, there was no
definite trend favoring or otherwise any particular cytoplasm. Where
detected, the magnitude of cytoplasmic influence was minimal with little
practical significance.
 
Date 2016-12-22T09:32:44Z
2016-12-22T09:32:44Z
2011-11-18
 
Type Thesis
 
Identifier Th-9908
http://krishikosh.egranth.ac.in/handle/1/91997
 
Language en
 
Format application/pdf
 
Publisher University of Agricultural Sciences GKVK, Bangalore