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Evaluation of kenyan wheat (Triticum aestimum L.) genotypes for leaf rust (Puccinia triticina Eriks.) at adult plant stage

By: Anncetta Gakii Nyamu, James O. Owuoche, Pascal P.O Ojwang, Ruth Wanyera

Key Words: Leaf rust, Wheat, Resistance

Int. J. Agron. Agri. Res. 11(6), 66-78, December 2017.

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Leaf rust (Puccinia triticina) is one of the major rust diseases that affect wheat (Triticum aestivum) production worldwide. The objective of this study was to determine genotypic variation among Kenyan wheat genotypes against leaf rust at adult plant stage. A set of 144 genotypes were evaluated in a two-season field experiments at Kenya Agricultural and Livestock Research Organization (KALRO), Njoro. In the field, genotypes were sown in 12 × 12 partially balanced lattice design. Adult plant infection assessed by Area under Disease Progress Curve ranged from means of 42.00 to 145.00. Mean grain yield ranged from 0.06 to 6.81 tonnes. ha-1. Highly significant (p ≤ 0.001) variations were noted among the seasons, genotypes tested over seasons and the interaction between genotype × season for plant height, a thousand kernel weight (TKW), and harvest index. There were significant (p ≤ 0.01) effects due to seasons and genotypes for spike length, days to maturity, leaf rust infection and grain filling period, biomass, yield, respectively. Effects due to seasons were significant (p ≤ 0.05) for hectoliter weight and stem rust infection. Genotypes K. Tai, K. Korongo, Fletcher, Verder, R1244, R1301 and R1305 exhibited adult plant resistance in both seasons. Considering the disease response and yield potential, genotypes R1301 and R1305 showed lowest leaf rust infection and highest grain yield. These genotypes are suitable candidates for utilization in yield and leaf rust resistance improvement programmes in Kenya.

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Evaluation of kenyan wheat (Triticum aestimum L.) genotypes for leaf rust (Puccinia triticina Eriks.) at adult plant stage

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Anncetta Gakii Nyamu, James O. Owuoche, Pascal P.O Ojwang, Ruth Wanyera.
Evaluation of kenyan wheat (Triticum aestimum L.) genotypes for leaf rust (Puccinia triticina Eriks.) at adult plant stage.
Int. J. Agron. Agri. Res. 11(6), 66-78, December 2017.
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