Generation means analysis of resistance to peanut bud necrosis caused by peanut bud necrosis tospovirus in peanut

Abstract

This study was conducted to evaluate the types of gene action governing the inheritance of resistance to peanut bud necrosis disease (PBND) in populations derived from three crosses involving two resistant (ICGV 86388 and IC 10) and one susceptible (KK 60–1) peanut lines. Populations were composed of P1 P2, F1 F2, BC11, BC12, BC11S and BC12S. These populations were evaluated for PBND incidence in a farmer's field in Kalasin province in north‐east Thailand, where PBND is a recurring problem. Results showed variations between crosses in the relative contributions of different types of gene effect. The results indicate that multiple genes control the PBND resistance trait, and that the two resistant lines differ in some of these genes. As non‐additive gene effects are important in all three crosses, selection for low PBND incidence in these crosses would be more effective in later generations.

Genetic molecular diversity in interspecific peanut lines differing in temporal resistance to peanut bud necrosis disease

“…The rest of the lines were moderately resistant to highly susceptible (Figure 1). Screening under field conditions at hot spot location has been used earlier for selection of peanut lines resistant to PBND (Pensuk et al, 2002a(Pensuk et al, , 2002b(Pensuk et al, , 2004Sunkad et al, 2012). Selected highly resistant, resistant and one susceptible elite cultivar were subjected to genetic diversity analysis (Table 1).…”

Appraisal of gene action for indeterminate growth in mungbean [Vigna radiata (L.) Wilczek]

“…Additive and non-additive gene actions control the inheritance of plant height in mungbean (Singh et al, 2007) and harvest index in wheat (Chand and Dawa, 1996). Several geneticists witnessed the existence of epistasis in the inheritance of quantitative character in different crops (Pensuk et al, 2004; Bnejd and El- Gazzah, 2008, 2010; Shashikumar et al, 2010). Accumulation and clustering of interacting sets of genes with additive influence could provide a path for the genetic improvement of quantitative traits.…”

Impact of Epistasis in Inheritance of Quantitative Traits in Crops

“…Therefore, the bias in the estimate of the additive variance when assuming the additive-dominant model is considerable. The preponderance of epistasis effect in the inheritance of quantitative trait in crops was recently reported by many geneticists (Pensuk et al, 2004;Bnejdi and El Gazzah, 2008;Bnejdi and ElGazzah, 2010a;Shashikumar et al 2010). Epistasis can have an important influence on a number of evolutionary phenomena, including the genetic divergence between species.…”