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MOLECULAR AND GENETIC EVALUATION FOR DROUGHT RESISTANCE AND PRODUCTIVITY IN HIGH IRON AND ZINC ACCESSIONS OF RICE (Oryza sativa L.) UNDER AEROBIC CONDITION

KrishiKosh

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Title MOLECULAR AND GENETIC EVALUATION FOR DROUGHT RESISTANCE AND PRODUCTIVITY IN HIGH IRON AND ZINC ACCESSIONS OF RICE (Oryza sativa L.) UNDER AEROBIC CONDITION
 
Creator GOTARKAR DHANANJAY, NARAYANRAO
 
Contributor . SHASHIDHAR, H E
 
Description Rice is the premier staple food of the world especially in the rainfed
areas of Asia, where drought is a major production constraint.
Recognizing this water scarce problem globally for rice production, the
better option is aerobic rice cultivation which saves almost 50 per cent of
water compared to puddled situation. Adaptation to aerobic condition is
specific to varieties. Thus, selection of superior genotypes from diverse
rice accessions through phenotyping for whole-plant architecture and
molecular characterization in rice is an attractive strategy. The total 168
diverse genotypes rich in Iron or Zinc or both were evaluated under
aerobic conditions to identify superior genotypes for root morphological
traits, grain yield and yield attributed traits. Field evaluation revealed
significant difference among the means of different genotypes for all the
traits except for productivity per day under aerobic condition. As root
morphological traits were directly related to drought resistance. Different
genotypes with higher root length and root number have been identified
and the superior genotypes were selected on the basis of high grain yield,
root characters and Iron – Zinc content in brown rice. The genotypes
TKM9, AM36, Type3, NLR145/Type-3, AM65, AM127, AM1, AM94B,
BJ21 and Vandana were found to be superior for yield and drought
resistance characters under aerobic condition in Kharif – 2011 and
Summer-2012 season, with high iron in BJ21(36.1 PPM) and AM65 (43.9
PPM) having high zinc content in brown rice as part-per-million. SSR
markers reported to be associated with drought tolerance traits were
used for validation. Among the seven SSR markers employed only two
were found to be significantly associated with drought tolerance traits
under aerobic condition.
 
Date 2016-12-07T08:58:54Z
2016-12-07T08:58:54Z
2012-08-06
 
Type Thesis
 
Identifier TH-10289
http://krishikosh.egranth.ac.in/handle/1/89360
 
Language en
 
Format application/pdf
 
Publisher University of Agricultural Sciences GKVK, Bangalore