Field Adaptation of Some Introduced Wheat (Triticum aestivum L.) Genotypes in Two Altitudes of Tropical Agro-Ecosystem Environment of Indonesia

  • ADEEL ABDUL KARIM ALTUHAISH Plant Biology Graduate Program, Graduate School, Bogor Agricultural University, Darmaga Campus, Bogor 16680, Indonesia
  • . MIFTAHUDIN Department of Biology, Faculty of Mathematics and Natural Science, Bogor Agricultural University, Darmaga Campus, Bogor 16680, Indonesia
  • . TRIKOESOEMANINGTYAS Department of Agronomy and Horticulture, Faculty of Agriculture, Bogor Agricultural University, Darmaga Campus, Bogor 16680, Indonesia
  • SUDIRMAN YAHYA Department of Agronomy and Horticulture, Faculty of Agriculture, Bogor Agricultural University, Darmaga Campus, Bogor 16680, Indonesia
Keywords: agro-ecosystem, heat stress, heat susceptibility index, high altitude, low altitude, wheat

Abstract

Heat stress is a major environmental factor limiting wheat productivity in tropical regions such as Indonesia. The objective of this  study was to investigate the adaptability of introduced wheat genotypes in tropical agro-ecosystems. Sixteen spring wheat genotypes were grown at two different altitudes i.e. low altitude (176 m asl) with an average temperature of 29.8 oC located at Leuwikopo Field Experimental Station, Bogor Agricultural University, Darmaga Bogor and high altitude  (1100 m asl) with an average temperature  of 20.6 oC at Cipanas Field Experimental Station (Ornamental Crop Research Station), Cianjur, West Java, Indonesia from July to November 2012. Plant height, number of tillers, flag leaf area, leaf angle, days to flowering, spike number per plant, empty spikelet number, grain weight per plant and 100 grain weight were observed following the standard methods. Heat susceptibility index was calculated based on grain weight per plant. The results showed that cultivation at a low altitude, hotter environment remarkably affected wheat growth and yield, as reflected in overall reduction of plant height, reduced number of tillers and leaf area, and ultimately reduced yield and yield components for most genotypes compared to the same measures taken at high altitude in lower temperatures. Plant growth  before  heading was similar in both locations, but the days to flowering  was longer in high altitude  than that in low altitude. High temperature stress in low altitude reduced the spike number/plant, grain weight/plant, 100 grain weight and increase number of empty spikelet/spike. Based on our results for heat susceptibility index, six genotypes, namely Sbr, Ymh, Astreb/Cbrd, Astreb/Ningma, H-20 and Nias, were characterized as heat tolerant genotypes.


Downloads

Download data is not yet available.
Published
2014-03-26
Section
Articles