Combining Ability Studies for Development of New Hybrids over Environments in Sunflower (Helianthus annuus L.)

Abstract

Seven CMS lines were crossed with six inbred lines in Line x Tester fashion to elucidate the information on the nature of gene action involved in the inheritance of important quantitative traits and to select the parents with good gca and crosses with good sca effects. The resultant 42 hybrids were evaluated along with their parents with three standard checks at three locations in Andhra Pradesh state viz., Hyderabad, Tandur, and Jagtial. The pooled analysis of variance for combining ability revealed that sca variance was higher in magnitude compared to gca variance for all the characters except oil content indicating the preponderance of non-additive gene action for all the characters while additive gene action for oil content. The gca effects of the parents in pooled analysis revealed that among the lines ARM 243B and CMS 17B and among the testers RHA-6D-1R, RES-834-1 and 3376R were found to be promising general combiners for seed yield and yield component characters. Based on significant sca effects in pooled analysis, five hybrids viz., CMS 89A x RES-834-1, CMS 17A x LTRR 341, ARM 243A x R 298, ARM 238A x 3376R and CMS 852A x R-649 were identified as promising for seed yield and other yield contributing characters.

Evaluation of combining ability and genetic components in sunflower

“…Heterosis effect (%) in addition to better parent Earlier reports of several authors are in agreement with our results indicating that nonadditive genetic component was more important in expression of oil content (PARAMESWARI et al, 2004;HLADNI et al, 2006;MACHIKOWA et al, 2011). Nonetheless, few other researchers reported higher importance of additive component in the expression of oil content (ROJAS and FERNADNEZ-MARTINEZ, 1998;MIJIĆ et al, 2008;CHANDRA et al, 2011).…”

Determination of Combining Ability in Sunflower Parents According to Line X Tester Analysis Method

“…The high heritability level in a broad sense and the low heritability level in a narrow sense meant that the effect of environmental variance of this trait was Kayışoğlu and Ada / Selcuk J Agr Food Sci, (2021) 35 (3): 249-258 high. It is in agreement with the findings of some researchers (Chandra et al, 2011;Göksoy et al, 1999;Tan, 1993).…”

Combining Ability And Nature of Gene Effects Controlling Seed Yield And Its Component Traits In Alien Cytoplasm Based Hybrids In Sunflower (Helianthus Annuus L.)

“…All the three best crosses involved at least one parent with low gca effects, clearly suggesting the involvement of non-additive gene action in the inheritance of the trait. Similar results were obtained by Chandra et al (2011) and Lakshman et al (2019).…”