Variance between and within the index of repeatability of quantitative characteristics of guava fruit

Authors

  • José Saúl Padilla Ramírez Campo Experimental Pabellón, Aguascalientes-INIFAP. Carretera Aguascalientes-Zacatecas, km 32.5. A. P. 20. Pabellón de Arteaga, Aguascalientes, México. C. P. 20660. Tel. 01 465 958 01 86
  • Ernesto González Gaona Campo Experimental Pabellón, Aguascalientes-INIFAP. Carretera Aguascalientes-Zacatecas, km 32.5. A. P. 20. Pabellón de Arteaga, Aguascalientes, México. C. P. 20660. Tel. 01 465 958 01 86
  • Víctor Manuel Rodríguez Moreno Campo Experimental Pabellón, Aguascalientes-INIFAP. Carretera Aguascalientes-Zacatecas, km 32.5. A. P. 20. Pabellón de Arteaga, Aguascalientes, México. C. P. 20660. Tel. 01 465 958 01 86
  • Luis Reyes Muro Campo Experimental Pabellón, Aguascalientes-INIFAP. Carretera Aguascalientes-Zacatecas, km 32.5. A. P. 20. Pabellón de Arteaga, Aguascalientes, México. C. P. 20660. Tel. 01 465 958 01 86
  • Esteban Salvador Osuna Ceja Campo Experimental Pabellón, Aguascalientes-INIFAP. Carretera Aguascalientes-Zacatecas, km 32.5. A. P. 20. Pabellón de Arteaga, Aguascalientes, México. C. P. 20660. Tel. 01 465 958 01 86
  • Efraín Acosta Díaz Campo Experimental General Terán- INIFAP. Carretera Montemorelos-China, km. 31. General Terán, N. L. C. P. 67400. Tel. 01 826 26 70 260

DOI:

https://doi.org/10.29312/remexca.v5i8.820

Keywords:

Psidium guajava, collections, descriptors, germplasm

Abstract

We estimated the variance between and within, an index of repeatability (IR) and the phenotypic correlations of ten quantitative characteristics of fruit (weight, polar and equatorial diameter, PD/ED ratio, hull thickness, number and weight of seeds, weight per seed, cavity diameter of calyx and total soluble solids) in 14 genotypes of the guava of the INIFAP seed bank, established in the Experimental Site "Los Cañones" in Huanusco, Zacatecas. Fruit characteristics were recorded in five fruits of each genotype in production cycles 2010 and 2012. The variance between genotypes showed the highest values in both years, which was ref lected in the index of repeatability, which f luctuated between 0.85y 0.98. This indicates the large variability of genotypes, attributed to the different origins and the environmental effect (temperature and precipitation) in each cycle. The correlation coefficient (r) between the fruit weight and the polar and equatorial diameters, hull thickness and cavity diameter of calyx had values from 0.74 to 0.96 (p≤ 0.01), while the TSS had the lowest values of correlation with the other variables. The results show the availability of germplasm that can be used in breeding programs considering the wide variability of the traits evaluated, as well as using the fruit weight as a selection criterion for fruits of larger diameter and hull thickness.

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Published

2018-01-31

How to Cite

Padilla Ramírez José Saúl, González Gaona Ernesto, Rodríguez Moreno Víctor Manuel, Luis Reyes Muro, Esteban Salvador Osuna Ceja, and Acosta Díaz Efraín. 2018. “Variance Between and Within the Index of Repeatability of Quantitative Characteristics of Guava Fruit”. Revista Mexicana De Ciencias Agrícolas 5 (8). México, ME:1423-32. https://doi.org/10.29312/remexca.v5i8.820.

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