Genetics of Root System Architecture Using Near-isogenic Lines of Melon

摘要: The study of the genetic control natural variation in root architecture Cucumis melo L. is complex due to difficulties phenotyping and quantitative nature traits their plasticity. A library near-isogenic lines (NILs), constructed by introgressing genome exotic Korean accession Shongwan Charmi (SC (PI161375)) into background cultivar Piel de Sapo (PS) has recently become available. In this work, we used population identify trait loci (QTLs) controlling growth architecture. We studied separately primary secondary tertiary systems during a 15-day period. Heritabilities for were moderate. Correlation principal component analysis showed inde- pendence among measuring length branching level, indicating possibility modifying both independently. PS SC clearly differed plant size. Significant allometric relationships between vine biomass some identified. use NILs with similar size allowed us avoid inaccuracies caused size-dependent traits. total 17 QTLs seven linkage groups identified: three length, diameter root, density, average roots, percentage roots bearing two density. most these traits, transgressive was observed.