title: Identification of marker-trait associations for morphological descriptors and yield component traits in sugarcane.
abstract: Ninety two sugarcane varieties from sub-tropical India were subjected to molecular profiling with 174 simple sequence repeat markers and characterized for 23 qualitative (morphological descriptors) and nine quantitative traits that directly or indirectly contribute to yield and juice quality. Using STRUCTURE-based population stratification study and a mixed linear model for marker-trait association (MTA) analysis, a total of 60 MTAs were identified for 22 qualitative traits that were able to explain a significantly higher (up to 40%) proportion of the phenotypic variations compared to all the previous reports of MTA studies in sugarcane. In addition, 21 MTAs stable over the three years of study were also identified for nine quantitative traits that explained 16-37% of the total trait variation. It could be concluded that the qualitative traits that are governed mostly by one or a few genes are more responsive to MTA studies and hence have a better potential to be adopted in marker-assisted breeding programmes in sugarcane. The MTAs identified in this study could also find significant applications in upcoming more stringent IP regime, which may necessitate tracking of specific alleles integrated in breeding programmes.
authors.affiliation: Division of Crop Improvement, Indian Institute of Sugarcane Research, Raibareli Road, P.O. Dilkusha, Lucknow, U.P. 226002 India.|Department of Biosciences, Integral University, Kursi Road, Lucknow, U.P. 226026 India.
authors.forename: Archana
authors.initials: A
authors.lastname: Siraree
authors.affiliation: Division of Crop Improvement, Indian Institute of Sugarcane Research, Raibareli Road, P.O. Dilkusha, Lucknow, U.P. 226002 India.
authors.forename: Nandita
authors.initials: N
authors.lastname: Banerjee
authors.affiliation: Division of Crop Improvement, Indian Institute of Sugarcane Research, Raibareli Road, P.O. Dilkusha, Lucknow, U.P. 226002 India.
authors.forename: Sanjeev
authors.initials: S
authors.lastname: Kumar
authors.affiliation: Division of Crop Improvement, Indian Institute of Sugarcane Research, Raibareli Road, P.O. Dilkusha, Lucknow, U.P. 226002 India.
authors.forename: M S
authors.initials: MS
authors.lastname: Khan
authors.affiliation: Division of Crop Improvement, Indian Institute of Sugarcane Research, Raibareli Road, P.O. Dilkusha, Lucknow, U.P. 226002 India.
authors.forename: P K
authors.initials: PK
authors.lastname: Singh
authors.affiliation: Division of Crop Improvement, Indian Institute of Sugarcane Research, Raibareli Road, P.O. Dilkusha, Lucknow, U.P. 226002 India.
authors.forename: Sanjeev
authors.initials: S
authors.lastname: Kumar
authors.affiliation: Department of Biosciences, Integral University, Kursi Road, Lucknow, U.P. 226026 India.
authors.forename: Swati
authors.initials: S
authors.lastname: Sharma
authors.affiliation: Division of Crop Science, Indian Council of Agricultural Research, Dr. Rajendra Prasad Road, Krishi Bhawan, New Delhi, 110 001 India.
authors.forename: R K
authors.initials: RK
authors.lastname: Singh
authors.affiliation: Division of Crop Improvement, Indian Institute of Sugarcane Research, Raibareli Road, P.O. Dilkusha, Lucknow, U.P. 226002 India.
authors.forename: Jyotsnendra
authors.initials: J
authors.lastname: Singh
keywords: Marker-trait associations; Qualitative traits; Simple sequence repeats; Sugarcane