Combining ability and correlation studies in 6×6 diallel crosses of sunflower (Helianthus annuus L.)
Paper Details
Combining ability and correlation studies in 6×6 diallel crosses of sunflower (Helianthus annuus L.)
Abstract
The current studies was carried out to determine combining ability and correlation in 6×6 diallel crosses of sunflower genotypes for some physiological traits at Khyber Pakhtunkhwa Agricultural University Peshawar during 2009-10.The planted materials consisted of parental lines and their F1 hybrids using randomized complete block design with three replications. Data were recorded on yield and other important agronomic characters. General combining ability (GCA) and specific combining ability (SCA) were significant for all parameters except, seeds head-1. GCA effects for head size, stem thickness were greater than SCA showing contribution of additive gene effects. For flowering and 100 grain weight SCA effects were of greater magnitude than GCA and showing contribution of non-additive gene effects. Plant height exhibited significant (P@ 0.01) positive correlation with flowering and 100 grain weight. Seed head-1 and head size exhibited significant positive correlation with 100 grains weight. Among parental genotypes Rising Sun, US-444 and HS-K6 were the best general combiners for all the traits. Cross combinations Rising Sun × HS-K6, Ausigold-7 × US-444, Ausigold-7 × SMH-0917, Hysun-33 × HS-K6, and Ausigold-7 × HS-K6 showed promising results for majority of the traits, hence could be used in future breeding programs.
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Amin Ullah Jan, Raziuddin, Midrarullah, Shariat Ullah, Ajmal Iqbal, Ayaz Ahmad, Siraj Ahmad, Fazal Mabood, Khaista Rahman (2017), Combining ability and correlation studies in 6×6 diallel crosses of sunflower (Helianthus annuus L.); IJAAR, V10, N5, May, P9-16
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