Genetic variation and QTLs related to root development in upland New Rice for Africa (NERICA) varieties.

ABSTRACT: To understand variation in the root development traits (total root length (TRL), maximum root length (MRL) and root number) of 18 New Rice for Africa (NERICA) varieties, seedlings were hydroponically grown under deficient and sufficient concentrations of two forms of nitrogen, NH₄ ⁺ and NO₃ ^-. The donor African rice variety, 'CG14' (Oryza glaberrima Steud.), showed greater TRL and MRL than three background Asian rice varieties (Oryza sativa L.). Wide distribution was observed in all traits of the 18 NERICAs. The 18 NERICAs and parental varieties were classified into three cluster groups by cluster analysis. Cluster Ia included only 'CG14'. Comparative analysis characterized cluster Ib (including 'NERICA7') as an active root elongati

SUBMITTER: Obara M 

PROVIDER: S-EPMC6507723 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature