DISCERNING PHENOTYPE AND MOLECULAR MARKERS BASED ASSOCIATION BETWEEN GRAIN NUMBER, ZINC AND IRON BIOFORTIFICATION OF RICE (Oryza sativa L.)
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Date
2017-07-30
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UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU
Abstract
Rice (Oryza sativa L.) is the primary source of energy for billions of people in
developing countries, yet the commonly consumed polished grain contains insufficient
levels of the key micronutrients zinc and iron which afflict billions of people throughout
that world.Hence there is a need for development of new varieties with high grain yield
potential ofhigh grain, zinc and iron status. This study is aimed to discern the correlation
between yield and micronutrient content of rice. For present investigation thirty different
genotypes and transgressive segregants of F5 population of ARB6XAM143, were grown
during Kharif-2016 in the field of Department of Plant Biotechnology, UAS (B). Grain
length, Grain yield per plant, plant height, biomass, and harvest index had significant
positive correlation with total number of grains per plant. These traits assist the indirect
selection of plants bearing high grain number per plant but grain length to width ratio
manifested significant positive correlation with grain zinc content. Similarly, grain iron
showed significant positive correlation with plant height. Molecular marker analysis was
established using candidate gene specific markers but there was no association found
with any of the markers used to the traits studied. Hence there is a need for further
analysis using advanced sequencing techniques. Thus these traits can be used for
selection in biofortification breeding programmes of rice.
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