Adult plant resistance to leaf rust (Puccinia triticina) in some Indian bread wheat (Triticum aestivum) accessions bearing leaf tip necrosis

J KUMAR; K C BANSAL; R K TYAGI; V K VIKAS; SUNDEEP KUMAR; P JAYAPRAKASH; G P SINGH; RAJBIR YADAV; M SIVASAMY

doi:10.56093/ijas.v84i1.37166

Authors

J KUMAR Indian Agricultural Research Institute, Wellington, Tamil Nadu 643 231
K C BANSAL NBPGR, New Delhi 110 012
R K TYAGI NBPGR, New Delhi 110 012
V K VIKAS Indian Agricultural Research Institute, Wellington, Tamil Nadu 643 231
SUNDEEP KUMAR NBPGR, New Delhi 110 012
P JAYAPRAKASH Indian Agricultural Research Institute, Wellington, Tamil Nadu 643 231
G P SINGH IARI, New Delhi 110 012
RAJBIR YADAV IARI, New Delhi 110 012
M SIVASAMY Indian Agricultural Research Institute, Wellington, Tamil Nadu 643 231

https://doi.org/10.56093/ijas.v84i1.37166

Keywords:

Leaf rust, Leaf tip necrosis (LTN), Lr 34, Wheat

Abstract

Of the 2200 germplasm accessions of Triticum aestivum L. screened under field condition against leaf rust (Puccinia triticina), 1526 exhibited symptom of leaf tip necrosis (LTN). Ninety eight per cent of accessions showing LTN revealed reduced leaf rust severities from traces to 40 compared to 80 - 100 in susceptible infector rows. LTN reduced leaf rust severities independent of its low, medium and high expressions across the accessions. Likely presence of durable resistance gene Lr34 associated with the trait of LTN, either singly or in complementation with other genes is discussed.

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