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Genetic Differences for Iron Absorption Efficiency Related Traits in Groundnut

OAR@ICRISAT

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Relation http://oar.icrisat.org/9233/
 
Title Genetic Differences for Iron Absorption Efficiency Related Traits in Groundnut
 
Creator Pattanashetti, S K
Upadhyaya, H D
Motagi, B N
Kanatti, A
Boodi, I
Biradar, B D
Naidu, G K
Chimmad, V P
 
Subject Groundnut
 
Description Iron deficiency chlorosis (IDC) is of common occurrence in groundnut growing areas with calcareous,
alkaline and black SOils which accounts to one-third of the Indian soils. Groundnut is sensitive to iron
deficiency, but shows genotypic differences for iron absorption efficiency (IAE) response. A pot
experiment was conducted using five genotypes with varying degree of IAE [ICGV 86031 , A30b
(efficient), TG 26 (moderately effiCient), TAG 24, TMV 2 (inefficient)] in normal and deficit Fe soil types to
determine underlying mechanisms. They were assessed for IAE related traits like visual chlorotic rating
(VCR), SPAD chlorophyll meter reading (SCMR), chlorophyll (a, b and total) content, active iron (Fe2+)
content. and peroxidase activity in initial expanded leaves across five crop growth stages (20, 40, 60, 60,
100 days) and also for productivity traits.
Iron absorption efficient groundnut genotypes recorded significantly lower VCR, higher SCMR, higher
active iron, chlorophyll (a, b and total) and peroxidase activity across all five crop growth stages
compared to inefficient genotypes. Severity of chlorosis was highest at 60 days during which significant
negative correlation was observed between VCR and IAE related traits like SCMR, chlorophyll (a, band
total) content, active iron content, and peroxidase activity indicating their utility as surrogate traits In
screening for IAE in groundnut. IAE related traits showed significant positive association with productivity
traits like pod yield, 100 seed weight, number of pods and primary branches. Pod yield reduction due to
iron chlorosis in efficlent genotypes was very less compared to inefficient genotypes.
 
Date 2015-07
 
Type Conference or Workshop Item
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/9233/1/Iron%20Absorption%20Efficiency%20in%20groundnut-47th%20APRES%20July%202015.pdf
Pattanashetti, S K and Upadhyaya, H D and Motagi, B N and Kanatti, A and Boodi, I and Biradar, B D and Naidu, G K and Chimmad, V P (2015) Genetic Differences for Iron Absorption Efficiency Related Traits in Groundnut. In: 47th Annual Meeting of the American Peanut Research and Education Society (APRES), July 14-16, 2015, Francis Marion Hotel, Charleston, SC, USA.