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Combining Ability of Response to Photoperiod in Peanut

OAR@ICRISAT

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Relation http://oar.icrisat.org/1144/
http://dx.doi.org/10.2135/cropsci1997.0011183X003700040022x
 
Title Combining Ability of Response to Photoperiod in Peanut
 
Creator Nigam, S N
Dwivedi, S L
Ramraj, V M
Chandra, S
 
Subject Groundnut
 
Description Photoperiod insensitivity plays an important role in the adaptation
of peanut (Arachis hypogaea L.) genotypes across environments.
Howeverl,i ttle is knowno f its genetic control. Theo bjective of this
study was to determine the combining ability of response to photoperiod
in peanut. The Ft progenies from a six-parent diallel cross excluding
reciprocals were studied together with their parents for response
to photoperiod under short and long day conditions in the field for
three seasons. The experimentw as conductedi n a split plot design with
photoperiod as main plots and genotype as subplots. The response to
photoperiod (Dst) was computed as the difference in harvest index
(adjusted pod weight/adjusted biomass) between short and long day
treatments. The mean square for response to photoperiod was highly
significant for parents and their crosses. Season by cross interaction
was the only significant interaction effect. The response to photoperiod
was mainly associated with general combining ability variance.
ICG2 405 and ICGV8 6031 were good general combiners for insensitivity
to photoperiod. All crosses of sensitive × sensitive and
sensitive × insensitive parents were sensitive to photoperiod. However,
in several cases, this response was not consistent across seasons
and resulted in a significant season × cross interaction. The F1 between
insensitive parents was insensitive to photoperiod in the three seasons
tested. A comparison of Ft response with parents and midparent
value of crosses between photoperiod sensitive and insensitive parents
suggested additive gene action in some crosses and partial dominance
to dominance in others.
 
Date 1997
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights —
 
Identifier http://oar.icrisat.org/1144/1/snn19975.pdf
Nigam, S N and Dwivedi, S L and Ramraj, V M and Chandra, S (1997) Combining Ability of Response to Photoperiod in Peanut. Crop Science, 37 (4). pp. 1159-1162.