Plant traits to complement selection based on yield components in wheat

The aim of the present study was to investigate the relationship between plant traits and yield per spike in wheat genotypes. The measured plant traits were: length of flag leaf blade, peduncle extrusion, peduncle, spike and sheath, culm diameter and plant height. Data were analyzed with correlation and path coefficient analysis. Yield per spike correlated positively with spike length and culm diameter. Path coefficient analysis indicated that, under irrigated condition, yield per spike had a positive direct effect and a positive correlation with spike length and culm diameter and, under non-irrigated condition, yield per spike showed a positive direct effect and a positive correlation with culm diameter, spike length and plant height. Culm diameter and spike length, under irrigated condition, and also plant height, under late season water stress condition, were the plant traits most related to higher grain yield per spike in wheat.

[1]  J. F. B. Neto,et al.  Correlation and path analysis of yield and its components and plant traits in wheat , 2004 .

[2]  M. A. Berg,et al.  Flag leaf area in five spring wheat crosses and the relationship to grain yield , 1977, Euphytica.

[3]  W. J. Whittington,et al.  Genotypic differences in flag leaf area and their contribution to grain yield in wheat , 1973, Euphytica.

[4]  K. Sayre,et al.  Plant traits related to yield of wheat in early, late, or continuous drought conditions , 2004, Euphytica.

[5]  M. P. Reynolds,et al.  Evaluating physiological traits to complement empirical selection for wheat in warm environments , 2004, Euphytica.

[6]  A. Blum,et al.  Improving wheat grain filling under stress by stem reserve mobilisation , 2004, Euphytica.

[7]  K. Nazari,et al.  Seedling and adult plant resistance to yellow rust in Iranian bread wheats , 2004, Euphytica.

[8]  M. Ginkel,et al.  CIMMYT's approach to breed for drought tolerance , 2004, Euphytica.

[9]  R. K. Scott,et al.  The ability of wheat cultivars to withstand drought in UK conditions: formation of grain yield , 2002, The Journal of Agricultural Science.

[10]  S. Nagarajan,et al.  Evaluation of ear: stem weight ratio as a criterion for selection of drought-tolerant wheat (Triticum aestivum) genotypes , 2001 .

[11]  L. Pecetti,et al.  YIELD VS. MORPHOPHYSIOLOGICAL TRAIT-BASED CRITERIA FOR SELECTION OF DURUM WHEAT IN A SEMI-ARID MEDITERRANEAN REGION (NORTHERN SYRIA) , 1998 .

[12]  W. Kronstad,et al.  Response of Four Spring Wheat Cultivars to Drought Stress , 1996 .

[13]  P. Monneveux,et al.  Physiology and genetics of terminal water stress tolerance in barley , 1995 .

[14]  D. Rasmusson.  A plant breeder's experience with ideotype breeding , 1991 .

[15]  R. B. Austin,et al.  Traits associated with high yield in barley in low-rainfall environments , 1991, The Journal of Agricultural Science.

[16]  A. Mayer.  Drought tolerance in winter cereals: : Edited by J. P. Srivastava, E. Porceddu, E. Acevedo and S. Varma, Proceedings of an International Workshop, Wiley, 1987, pp. xvi + 387. £25.50. , 1988 .

[17]  M. Saleem,et al.  Relation between Flag Leaf, Yield of Grain and Yield Components in Wheat , 1976, Experimental Agriculture.

[18]  P. Hsu,et al.  Relationships Between Yield and Its Components and Structures Above the Flag Leaf Node in Spring Wheat 1 , 1971 .