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Information Journal Paper

Title

PATH ANALYSIS OF GRAIN YIELD LINES AND TESTCROSSES OF OPAQUE-2 MAIZE

Pages

  131-143

Abstract

 In order to study the interrelationships between the GRAIN YIELD and its components and determine the most effective components on GRAIN YIELD of opaque - 2 maize, 16 opaque-2 lines and their testcrosses were evaluated in Seed and Plant Institute, Karaj , Iran in 1994. The experimental design was nested split plot with three replications. Each replication consisted of two main-plots (inbreds and testcrosses). Within main plots, 16 opaque - 2 INBRED LINEs and 16 corresponding testcrosses were arranged, respectively. Twenty traits were measured as: number of days to tasselling and silking, plant and ear height, stem diameter, length, width and area of the leaf above the first ear, relative growth rate, total number of leaves, number of leaves above the first ear, number of kernel rows, number of kernels per row, ear length and diameter, cob diameter, percentage of cob, kernel depth, 300 kernel weight and GRAIN YIELD. Before path analysis stepwise regression of 20 traits on GRAIN YIELD was done using INBRED LINEs and also their testcrosses. Path analysis and stepwise-regression showed that the GRAIN YIELD of opaque-2 lines is affected by the direct and indirect effects of number of days to silking, ear length and diameter, number of kerels per row and percentage of cob. Regarding the residual of 0.37 and coefficient of determination of 0.86, it could be stated that the large proportion of variation in GRAIN YIELD of opaque-2lines is related to the traits mentioned above. The GRAIN YIELD of testcrosses was explained by the direct and indirect effects ear length, ear diameter and number of kerenels per row. Considering the residual of 0.44 and coefficient of determination of 0.76, the large proportion of the variation in GRAIN YIELD of testcrosses were determined with these characteristics. In conclusion ear length, ear diameter and number of kernels per row could be regarded as the major components of GRAIN YIELD in OPAQUE-2 MAIZE.  

Cites

References

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APA: Copy

GHORBANZADEH, M., GERAMI, A., MOGHADDAM, A., & BANKEHSAZ, A.. (2001). PATH ANALYSIS OF GRAIN YIELD LINES AND TESTCROSSES OF OPAQUE-2 MAIZE. JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES, 8(1), 131-143. SID. https://sid.ir/paper/9069/en

Vancouver: Copy

GHORBANZADEH M., GERAMI A., MOGHADDAM A., BANKEHSAZ A.. PATH ANALYSIS OF GRAIN YIELD LINES AND TESTCROSSES OF OPAQUE-2 MAIZE. JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES[Internet]. 2001;8(1):131-143. Available from: https://sid.ir/paper/9069/en

IEEE: Copy

M. GHORBANZADEH, A. GERAMI, A. MOGHADDAM, and A. BANKEHSAZ, “PATH ANALYSIS OF GRAIN YIELD LINES AND TESTCROSSES OF OPAQUE-2 MAIZE,” JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES, vol. 8, no. 1, pp. 131–143, 2001, [Online]. Available: https://sid.ir/paper/9069/en

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