The Response of Advanced Generation Wheat Lines Derived from Convergent Breeding to Biotic Stress in High Altitude Area
This title has been presented on Thursday, December 14, 2023 at 14.00-14.10 GMT+7.
Abstract
This title has been presented on Thursday, December 14, 2023 at 14.00-14.10 GMT+7.
Wheat development in tropical regions faces various obstacles, one of which is biotic stress from pests and diseases.. This research aims to determine how these limiting factors inhibit production improvement. The study was conducted in high altitude areas above 1000 m asl, characterized by high rainfall and various organisms that symbiotically adapt to wheat plants. An analysis was performed to assess the impact of biotic stress on the observed response variables. The research followed a randomized complete block design (RCBD) with 3 replications, consisting of 26 advanced-generation wheat lines derived from convergent breeding and four check varieties: Dewata, Guri-5, Guri-6 (wax), and Selayar. The correlation analysis and stepwise regression method were employed to identify the influential factors on the observed variables. Results showed that some organisms impacted lodged plants, empty spikelets, and yellow spots on flag leaves. The percentage of empty florets was the most significant factor affecting seed yield. The presence of insects such as Leptocorisa sp., Coptosoma sp., Riptortus sp., and Nezara viridula, which predominantly extract sap during the formation of grains on the main wheat spike, is suspected of causing the occurrence of empty florets.
