GENETIC VARIABILITY FOR NITROGEN USE EFFICIENCY (NUE) AND YIELD ATTRIBUTING TRAITS IN WHEAT
Journal Title: International Journal of Agriculture Sciences - Year 2016, Vol 8, Issue 48
Abstract
An experiment was conducted to study the genetic variability, heritability and expected genetic advance for morpho-physiological, yield and NUE component traits in wheat accession under two different N levels. A set of 84 wheat genotypes was evaluated at two different nitrogen regimes, the T0 (without an external supply of nitrogen) and T1 (100 kg N/ha, RDF). All the characters studied, have shown good amount of variability in the genotypes. The mean performance of physiological traits like NDVI and SPAD, yield related traits like the number of tillers per meter row, spikelet’s per spike, spike length (cm), thousand grain weight (g) and seed yield (q/ha) and nitrogen use efficient traits like grain N, straw N, nitrogen uptake efficiency (NUpE) was found to be higher under the treatment with external supply of nitrogen (T1) than under the nitrogen stress treatment (T0). The high PCV and GCV values were recorded for trait grain yield, biomass and NUE, which indicates that, these characters have high variability that in turn offers good scope for selection. The high heritability estimates along with high genetic advance was obtained for NDVI at anthesis stage, days to fifty percent flowering, spike length, grain yield, biomass, harvest index (%), straw N, NUtE, NUpE and NUE. These traits are the most important to be taken into consideration for effective selection in wheat for NUE. Based on the four key variables determining N-efficiency in a wheat crop are grains N, NHI, high grain yield and high nitrogen use efficiency can be considered as important criteria for selection of high NUE in wheat. The genotypes viz., 2nd WYCYT 34, 3 rd SATYN 9403, 5th CISA HTEM 10212 and WH 1022, were found showed the highest performance for these characteristics at both T0 and T1 nitrogen levels. These identified lines would be further used in development of nitrogen use efficient wheat varieties, which will greatly facilitate the resource poor farmers to enhance the productivity.
Authors and Affiliations
T. N. SATHISHA
SOIL MACRO- AND MICRO- NUTRIENT STATUS OF CHANDEL DISTRICT, MANIPUR-INDIA
An experiment examining the macro-and micro-nutrients of various soils of Chandel district, Manipur (India) was conducted to investigate the soil fertility and micro-nutrient position and association between them. Surfac...
ECONOMIC ANALYSIS OF THE WORLD LARGEST FRESH COCONUT MARKET IN INDIA
The world’s largest fresh (tender) coconut market is located in Maddur about 80 kms from Bengaluru, exclusively built for tender coconut. The study pertains to analysis of marketing of tender coconut in Maddur. The dat...
NANO FERTILIZERS IS A NEW WAY TO INCREASE NUTRIENTS USE EFFICIENCY IN CROP PRODUCTION
Nano fertilizers are the important tools in agriculture to improve crop growth, yield and quality parameters with increase nutrient use efficiency, reduce wastage of fertilizers and cost of cultivation. Nano-fertilizers...
DIAGNOSIS OF CANINE DEMODICOSIS BY INDIRECT- ELISA IN HYDERABAD OF TELANGANA STATE
Canine demodicosis is an inflammatory, non pruritic and non contagious condition is characterized by the presence of numerous mites on the skin. Skin scraping, trichoscopy and skin biopsy are the common diagnostic method...
GROWTH AND YIELD OF URDBEAN (Vigna mungo L. Hepper) AS INFLUENCED BY SUNFLOWER (Helianthus annuus L.) RESIDUE MANAGEMENT
A field experiment was conducted during kharif, 2014 at Main Agricultural Research Station, University of Agricultural Sciences, Dharwad to study the management of summer sunflower (Helianthus annuus L.) residue in khari...