title: Characterization of functional trait diversity among Indian cultivated and weedy rice populations.
abstract: Weedy rice, a menace in rice growing areas globally, is biosimilar having attributes similar to cultivated and wild rice, and therefore is difficult to manage. A study was initiated to characterize the functional traits of 76 weedy rice populations and commonly grown rice cultivars from different agro-climatic zones for nine morphological, five physiological, and three phenological parameters in a field experiment under an augmented block design. Comparison between weedy and cultivated rice revealed a difference in duration (days) from panicle emergence to heading as the most variable trait and awn length as the least variable one, as evidenced from their coefficients of variation. The results of principal component analysis revealed the first three principal components to represent 47.3% of the total variation, which indicates an important role of transpiration, conductance, leaf-air temperature difference, days to panicle emergence, days to heading, flag leaf length, SPAD (soil-plant analysis development), grain weight, plant height, and panicle length to the diversity in weedy rice populations. The variations existing in weedy rice population are a major reason for its wider adaptability to varied environmental conditions and also a problem while trying to manage it.
authors.affiliation: Indian Council of Agricultural Research-Directorate of Weed Research, Jabalpur, Madhya Pradesh, India.
authors.forename: M
authors.initials: M
authors.lastname: Rathore
authors.affiliation: Indian Council of Agricultural Research-Directorate of Weed Research, Jabalpur, Madhya Pradesh, India.
authors.forename: Raghwendra
authors.initials: R
authors.lastname: Singh
authors.affiliation: Indian Council of Agricultural Research-Directorate of Weed Research, Jabalpur, Madhya Pradesh, India.
authors.forename: B
authors.initials: B
authors.lastname: Kumar
authors.affiliation: The Centre for Plant Science, Queensland Alliance for Agriculture and Food Innovation (QAAFI), The University of Queensland, Toowoomba, Queensland, 4350, Australia.
authors.forename: B S
authors.initials: BS
authors.lastname: Chauhan
mesh_terms: D014644:Genetic Variation; D012275:Oryza / Q000235:genetics* / Q000502:physiology; D019655:Quantitative Trait, Heritable