PJB-2017-126
GENETIC ANALYSIS OF SOME YIELD ASSOCIATED TRAITS AND LEAF RUST RESISTANCE OF F2 SEGREGATING POPULATION OF WHEAT
ABDUL WAJID CHANNA, MAHBOOB ALI SIAL, HADI BUX, SADAF TABASSUM QURESHI AND RABIA ASMA MEMON
Abstract
Genetic analysis of some yield contributing traits of four F2 segregating populations (NIA-Amber x Marvi-2000, TD-1 x Khirman, NIA-10/8 x NIA-Amber and Marvi-2000 x NIA-Sunehri) originated from cross combinations of six parental wheat varieties was conducted. Experiment was carried out at Experimental Farm of Nuclear Institute of Agriculture, Tandojam, Pakistan during wheat season, 2013-14. Genetic parameters viz. genetic variance (Vg), environmental variance (Ve), heritability in broad sense (h2b.s) and genetic advance (G.A) were studied for days to booting, days to heading, days to maturity, grain filling period, plant height, spike length, spikelets per spike, grains per spike, thousand grains weight, grain yield per plant, grain yield per plot, biological yield per plot, harvest index and leaf rust resistance. Results revealed that F2 progenies Marvi-2000 x NIA-Sunehri and NIA-10/8 x NIA-Amber were found best combiner progenies with potential to transfer highest heritability with genetic advance for traits viz. days to booting, days to heading, days to maturity, grain filling period, plant height, grains per spike, grain yield per plant and harvest index. For leaf rust resistance, NIA-10/8 x NIA-Amber showed highest heritability along with genetic advance, indicating selection improvement and greater effectiveness. Highest heritability (h2b.s) was recorded for plant height (80.1%), 1000-grain weight (90.7%), grain yield per plant (95.9%), grain yield per plot (95.7%), harvest index (95.8%) and leaf rust resistance (85.2%). Our findings provided valid information regarding genetic architecture of various yield associated traits and leaf rust resistance of above segregating progenies which could be utilized in future breeding programmes.
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