Dwarfing genes in wheat: effects on some yield components

  • G. F. Covas INTA EEA-ANGUIL, La Pampa.
  • M. L. Faraldo Universidad Nacional de La Pampa, Facultad de Agronomía
  • M. M. A. Lorences Universidad Nacional de La Pampa, Facultad de Agronomía
  • A. A. Suarez INTA EEA-ANGUIL, La Pampa.

Keywords:

wheat, dwarf genes, isogenic Iines, yield components, pampeana semiarid Region

Abstract

The effects of the dwarfing genes Rht1, Rht2 and Rht3, alone or in combination, on wheat , plant height, number of tillers, kernerl (grain) weight, yield, spike length, number of kernels per spike, number of spiklets per spike, number of kernels per spiklets, time to heading, width and length of flag leaf and foliar area, were studied. Isogenic Iines, with and without dwarfing genes, developed from the cultivars Maringá and Nainari 60 were used. The dwarfing genes decreased plant height,kernerl weight and flag leaf length and increased the number of kernels per spiklets, number of kernels per spike, flag leaf width and time lo heading. The combination of Rht1 + Rht2 and the allele Rht3, accentualed these effects (p<0.05). The Rht alleles did not have significant effects on the other characlers studied.

Downloads

Download data is not yet available.

References

ALLAN, R. E 1980. Influence of semldwarfism and genetic background on stand establishment of wheal. Crop Science 20: 634-638.

ALLAN, R. E. 1986. Agronomic comparisons among wheat lines nearly isogenics for three reduced-height genes. Crop Science 26: 707-710

ALLAN, R. E 1989. Agronomic comparisons belween Rht1 and Rht2 semidwarf genes in winter whea!. Crop science 29: 1103-1108.

COVAS, F. G., SUAREZ, E.Y. y SAFONT LIS. 1990. Pleiotropismo versus genes ligados para interpretar el efecto del cromosoma 40 de trigo en diferentes componentes del rendimiento. 11 Congreso Nacional de Trigo.17-19 de octubre de 1990. Pergamino. Actas Cap.lI: 91-100.

GALE et al. 1975. The nature and genetic control of gibberellic insensitivity in dwarf wheat grain.Heredity 35 :55-65.

GALE, M. D. AND MARSHALL, G.A.1976. The chromosomal location of GAI 1 and Rht1 gen for gibberellic insensitivity and semi-dwarfism, in a derivative of Norin 10 whea!.Heredity 37:283-289.

GALE, M. D. 1979. The effects of the Norin 10 dwarfing genes on yield in heat. Proc. 5th In!. VVheat Gen. Symp., New Delhi, India, February 1978: 978-987.

GALE, M. D. and LAW, C. D. 1976. The identification and exploitation of Norin 10 semidwarfing genes. Annual Report P.B.E. Cambridge, England: 21-35.

GALE, M. D. and YOUSSEFIAN, S. 1985. Dwarfing genes in whea!. In Progress in plant breeding (Russell, G. E. Ed.), Butterworth and Co. London: 1-35.

INNES, P., HOOGENDOORN, J. and BLACKWELL, R. D. 1985. Effects of differences in date of ear emergence and height on yield of winter wheat. J. Agric. ScLCamb. 105: 543-549

Mc VITTIE, J. A., GALE, M. D., MARSHALL, G. A. and WESCOTT, B. 1978. The intra-chromosomal mapping of the Norin 10 and Tom Thumb dwarfing genes. Heredity 40: 67-70.

MI RALLES, D. J. Y SLAFER, G.. A. 1990 Estimación del área foliar en trigo: Generación y validación de un modelo. 11 Congreso Nacional de Trigo. Pergamino. Cap.l: 76-85.

NIZAM UDDIN, M. and MARSHALL, D. R. 1989. Effects of dwarfing genes en yield and yield components under irrigated and rainfed conditions in wheat. Euphytica 42: 127-134.

SIP, V., AMBLER, P., BOBKOVA, L. and SKORPIK, M. 1988. Efficiency of early generations selection for Rht2 in a Czechoslovak wheat breeding programme. Proc. 7th In!. Wheat Gen. Symp. Cambridge, 1988: 1175-1180.

SNAPE, J. W. and PARKER, B. B. 1984. The effects of the Norin 10 dwarfing genes Rht2, on yielá-biomass relationships in whea!. IAEA Tec. Doc. 307: 71-77.

SUAREZ, E. Y., NENCINI, A. y TORROGLOSA, J. 1986. Efectos genéticos del cromosoma 4 O portador del alelo Norin (Rht2) de trigo. 1° Congreso Nacional de Trigo. Pergamino, 6-10 Oct. de 1986. Cap. 1: 184-190.

WORLAND, A. J. and PETROVIC, S. 1988. The gibberellic acid insensitive dwarfing gens from the wheat variety Saitama 27. Euphytica 38: 55-63.

YOUSSEFIAN, S. 1986. The development and pleiotropic effects of G. A. insensitive dwarfing genes in wheat. Ph. D. thesis, University of Cambridge.

Published

2020-06-06

How to Cite

Covas, G. F., Faraldo, M. L., Lorences, M. M. A., & Suarez, A. A. (2020). Dwarfing genes in wheat: effects on some yield components. Semiárida, 8(1), 9–18. Retrieved from https://ojs.unlpam.edu.ar/index.php/semiarida/article/view/4912

Issue

Section

Artículos Científicos y Técnicos