Genetic Variability, Heritability and Genetic Advance for Morphological Traits in F5:6 Rice Lines
Genetic Variability, Heritability and Genetic Advance for Morphological Traits in F5:6 Rice Lines
Arshad Iqbal1*, Syed Mehar Ali Shah1, Hidayat ur Rahman1, Faiza Aman2 and Aziz-ur-Rahman1
ABSTRACT
This study was conducted to investigate variability, heritability and genetic advance among F5:6 lines of rice for various morphological traits. Thirty-eight lines derived from F5 rice cross combinations along with their 8 parents were planted in a randomized complete block design (RCB) having three replications at The University of Agriculture, Peshawar during 2016 rice crop growing season. Data were taken on some of the morphological traits like number of days to heading (days), number of days to maturity (days), flag leaf area (cm2), culm length (cm), panicle length (cm), primary branches panicle-1 (no.) and secondary panicle branches (no.). Analysis of variance showed highly significant (p ≤ 0.01) differences for parents, F5:6 lines and parents vs F5:6 lines for all the studied traits. Among the F5:6 lines, AUP-304 showed minimum days to heading (91 days) while the F5:6 line AUP-361 took minimum days to maturity (118 days). F5:6 line AUP-311 exhibited maximum flag leaf area (55 cm2) and maximum culm length (132.3 cm). Maximum panicle length (28.3 cm) among F5:6 lines was recorded for AUP-271, whereas, AUP-345 and AUP-322 showed best performance for primary panicle branches (13) and secondary panicle branches (41.3), respectively. High broad-sense heritability estimates were observed for all the studied characters, number of days to maturity (99.6%), culm length (99.4%), flag leaf area (98.9%), days to heading (95.9%), secondary branches panicle-1 (88.3%), panicle length (70.7%) and primary branches panicle-1 (60.6%), respectively. Genetic advance estimation showed that flag leaf area exhibited high genetic advance (40.2%) followed by secondary branches panicle-1 (36.6%) and culm length (31.4%) among studied traits of rice genotypes. On the basis of good performance for early maturity, area of flag leaf and panicle contributing traits like primary and secondary branches panicle-1 F5:6 lines AUP-361, AUP-311 and AUP-345, AUP-322 could be advanced further in multi-locations trials to develop new rice genotypes for local cultivation.
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