香禾糯米饭质构特性QTL定位分析OA

[Objective]QTLs regulating rice texture characteristics of RIL populations of Goudang 3(a kam sweet rice variety)and Huazhan(a conventional indica rice variety)were identified to provide a theoretical basis for breeding high-quality edible rice.[Method]The phenotypic data based on rice texture characteristics of Goudang 3 and Huazhan RIL populations in 2023 and 2024 were used to conduct QTL mapping of rice texture characteristics by an inclusive composite interval mapping.[Result]A total of 36 detected QTLs regulating rice texture characteristics including 3 for hardness,1 for adhesiveness,7 for springiness,7 for chewiness,7 for gumminess,9 for cohesiveness,and 2 for resilience were distributed on chromosomes 1,2,3,4,5,6,7,9,11,and 12,respectively.Their LOD value and contribution rate were 2.507-3.456 and 3.740%-9.237%,separately.7 QTLs of qSN-6-1,qSN-6-2,qSN-6-3,qCN-3-1,qCN-3-2,qCON-3-3 and qCON-7 were overlapped with the reported QTL loci.[Conclusion]36 QTLs regulating rice texture characteristics are detected from Goudang 3 and Huazhan RIL populations.Among them,7 QTLs are overlapped with the reported QTL loci,and other QTL loci will be new target spots for follow-up map-based cloning.