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Valuable New Leaf or Inflorescence Resistances Ensure Improved Management of White Rust ( Albugo candida ) in Mustard ( Brassica juncea ) Crops
Author(s) -
Barbetti Martin J.,
Li Cai Xia,
You Ming Pei,
Singh Dhiraj,
Agnihotri Abha,
Banga Shashi K.,
Sandhu Prabhjodh S.,
Singh Rajender,
Banga Surinder S.
Publication year - 2016
Publication title -
journal of phytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 60
eISSN - 1439-0434
pISSN - 0931-1785
DOI - 10.1111/jph.12425
Subject(s) - biology , brassica , rust (programming language) , inflorescence , incidence (geometry) , horticulture , agronomy , botany , computer science , programming language , physics , optics
Field resistances/susceptibilities against Albugo candida race 2V were determined for 29 Indian Brassica juncea varieties and compared with resistant varieties from China (6) and Australia (7). ‘Basanti’ (AUDPC incidence 46.7; AUDPC severity 29.2) represents the first high‐level resistance to race 2V in Indian varieties. Several others showed lower but still useful levels of resistance, including Narendra Ageti Rai‐4 (AUDPC incidence 150.6; AUDPC severity 66.8) and JM1 (AUDPC incidence 167.1; AUDPC severity 83.7). Highly susceptible Indian varieties had AUDPC incidence values >200 and severity >100. ‘Basanti’ had least stagheads/plant (0.32), while Narendra Ageti Rai‐4 had lowest % plants with stagheads (2.48). In contrast, almost half of Indian varieties had stagheads/plant >1 and % plants with stagheads >4, and >26 for ‘Kranti’. The resistance in ‘Basanti’ paves the way forward towards significantly improved white rust management in mustard in India. JM06011, JM06021, JR049 from Australia and CJB‐003 from China had zero leaf incidence. There were significant (P < 0.001) relationships between disease incidence with severity (R 2 0.92), stagheads/plant (R 2 0.69) and also % plants with stagheads (R 2 0.60); between disease severity with stagheads/plant (R 2 0.68) and also % plants with stagheads (R 2 0.69); and between stagheads/plant with % plants with stagheads (R 2 0.59).