Genetic relationship between grain chalkiness, protein content, and paste viscosity properties in a backcross inbred population of rice

详细信息    查看全文

• 作者：Leina Zheng ; Wenwei Zhang ; Shijia Liu ; Liangming Chen ; Xi Liu ; Xingang Chen ; Jing Ma ; Weiwei Chen ; Zhigang Zhao ; Ling Jiang ; Jianmin Wan
• 关键词：Rice (Oryza sativa L.) ; Protein content ; RVA profile ; Chalkiness
• 刊名：Journal of Cereal Science
• 出版年：2012
• 出版时间：September, 2012
• 年：2012
• 卷：56
• 期：2
• 页码：153-160
• 全文大小：232 K

文摘

A backcross inbred line population derived from a cross between Koshihikari and Kasalath was used to dissect the genetic relationship among chalkiness, protein content, and paste viscosity properties in rice in three environments. A total of 11 traits (or parameters) were analyzed, including percentage of grains with chalkiness (PGWC), protein content (PC) and protein index (PI), and eight parameters from the viscosity profile. PGWC, PC and PI were significantly correlated with the paste viscosity parameters. We identified 39 QTLs in three environments; ten QTL clusters emerged. Eight QTLs were consistently detected across the three environments and further confirmed using a set of chromosome segment substitution lines (CSSLs) where Kasalath was used as the donor parent and Koshihikari as the recurrent parent. One and two major clusters on chromosome 6 corresponded to the Wx and Alk loci, respectively. The former was responsible for PGWC and most of the viscosity parameters, and the latter for PI and some viscosity parameters. Particularly, QTL qPI-6.1 was linked with both the Wx and Alk loci. The co-locations of QTLs for PGWC and viscosity parameters and the linkage of qPI-6.1 and qBDV-6 at the Wx locus could be largely responsible for the phenotypic correlations between these traits.