quantitative trait locus
Identification of QTLs for resistant starch and total alkaloid content in brown and polished rice
An F3 population consisting of 117 F2:3 families derived from a cross between two varieties of rice, Gongmi No. 3 and Diantun 502, with a large difference in their resistant starch and total alkaloid content, was used for quantitative trait locus (QTL) mapping. Two QTLs of resistant starch for rice (qRS7-1, qRS7-2) were identified in a linkage group on chromosome 7, which could explain phenotypic variance from 7.6 to 17.3%, due to additive effects for resistant starch from Gongmi No.
Quantitative trait locus analysis for kernel width using maize recombinant inbred lines
Maize (Zea mays L.) kernel width is one of the most important traits that is related to yield and appearance. To understand its genetic mechanisms more clearly, a recombinant inbred line (RIL) segregation population consisting of 239 RILs was used for quantitative trait locus (QTL) mapping for kernel width. We found four QTLs on chromosomes 3 (one), 5 (two), and 10 (one). The QTLs were close to their adjacent markers, with a range of 0-23.8 cM, and explained 6.2-19.7% of the phenotypic variation.
Genetic analysis of maize kernel thickness by quantitative trait locus identification
Kernel thickness is one of the most important traits in kernel structure, and is related to yield. To ascertain its genetic information more clearly, an immortal recombinant inbred line segregation population was used to map the quantitative trait loci (QTLs) for kernel thickness. As a result, two QTLs were identified on chromosome 9; both of them had negative additive effects, and could decrease kernel thickness to some extent. The QTLs explained 25.8% of the total phenotypic variation.