Genetic Analysis for Yield and Yield Components in Rapeseed
| Autor: | NAHEED, Hafsa, Raziuddin, FARHATULLAH, SOHAIL, Quahir, KHAN, Nadia |
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| Rok vydání: | 2017 |
| Předmět: | |
| Zdroj: | Volume: 4, Issue: 4 376-384 Türk Tarım ve Doğa Bilimleri Dergisi |
| ISSN: | 2148-3647 |
| Popis: | Information on estimates ofcombining ability and heritability of the promising lines of breeding materialis important for evolving higher yielding varieties of rapeseed (Brassica napus L.). To estimate the combining ability and heritability of F2 populationsof 4 x 4 full diallel crosses and parents, an experiment was carried out at TheUniversity of Agriculture, Peshawar, in growing season 2012-2013. Four parentallines and F2 populations of six direct and six reciprocal crosseswere planted in the experiment using randomized complete block design. Datawere recorded on yield and yield components. Analysis of variance revealedsignificant variation among genotypes for all the parameters studied. Yield plant-1 ranged from 4.27 to 9.17 g,pods main- raceme-1 ranged from 42 to 89 and seeds pod-1rangedfrom 8 to 18. Among parents highest yieldplant-1 and seeds pod-1were observed for AUP-402. CrossAUP-402 x AUP-401 produced the highest seed yield plant-1 and morepods plant-1. The results of combining ability analysis showed thatgeneral combining ability was significant at p ≤ 0.01 for pods main-raceme-1andseeds pod-1. SCA and reciprocal effects were significant at p ≤ 0.01for pods main-raceme-1, seeds pod-1 and seed yield.Genotype AUP-401 was best general combiner for several parameters. CrossesAUP-403 x AUP-404 and AUP-401 x AUP-402 were best specific combiners for seedyield plant-1. Heritability (bs) estimates were high (>70%) for seeds pod-1.Moderate heritability values were observed for seed weight and seed yield plant-1.The variance components of specific combiningability (SCA) were greater than respective general combining ability (GCA)components of all the characters signifying the presence of non-additivegenetic effects in transfer of these traits and for that reasonselection in the later generations should be practiced for improvement of thesetraits. |
| Databáze: | OpenAIRE |
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