Inheritance of leaf color in papaya

Abstract

Physiological disturbances are one of the major bottlenecks to the expansion of papaya crops due to the negative influence on fruit quality. Studies on genotypes of light-green color have become essential to the development of strategies of tolerance to the physiological disorder skin freckle. Understanding the inheritance of qualitative traits is crucial to selection and prediction of the behavior of segregating generations. Thus, this study aimed to determine the inheritance of the qualitative trait leaf color in segregating generations of crosses between the dark-green cultivar BSA and the light-green cultivar GPC. Inheritance was determined based on the Mendelian genetics laws, by evaluating the phenotypic proportions in the analysis of generations P 1 (BSA), P 2 (GPC), F 1 , F 2 , BC 1 , BC 2 , BC 2r , and F 2:3. The inheritance of light-green leaves from the crossing between BSA and GPG is due to double recessive epistasis.

Genetic control of leaf spinescence in BRS Imperial, Pérola, and Pico de Rosa pineapple cultivars

“…Generally, qualitative traits, such as the leaf color in papaya (Nascimento et al 2019), flower color and growth habit in linseed (Yadav et al 2017), resistance to yellow rust in wheat (Rodríguez-García et al 2019), resistance to fusarium wilt in common bean (Batista et al 2017), traits related to maturity in cowpea (Santos et al 2020), and pineapple plant leaf margin spinescence are little or not at all affected by the environment, but are or 2017under simple genetic control conditioned by one or a few genes. Such traits are studied by analyzing generations, with separation of individuals into distinct phenotypic classes or proportions (Collins and Kerns 1946, Souza et al 2011, Urasaki et al 2015.…”