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Determination of Physiological Races and Evaluation of Sunflower for Resistance to Puccinia helianthi Schw
Author(s) -
Jing Lan,
Xu Xin,
Jing Jiali,
Li Li,
Navi Shrishail S.
Publication year - 2015
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.12296
Subject(s) - sunflower , biology , hybrid , rust (programming language) , helianthus annuus , race (biology) , spore , plant disease resistance , open pollination , resistance (ecology) , agronomy , horticulture , botany , pollination , gene , pollen , biochemistry , computer science , programming language
Sunflower rust, caused by Puccinia helianthi Schw., is a widespread disease of sunflower ( Helianthus annuus L.) in China. To study physiological races, sunflower field surveys were undertaken in major sunflower growing areas of China in 2010. Forty‐four rust‐infected sunflower leaf samples were collected from 25 geographical locations. Freshly produced spores were used to study physiological race differentiation on a set of nine differentials. Race 300 was the most prevalent race observed over all locations with a 59% frequency followed by races 735, 310, 500, 724 and 737. To evaluate hybrids and varieties for resistance screening, spores of race 300 were used to inoculate 65 hybrids, and five open‐pollinated varieties selected from breeding programmes and from the seed market. None of the confection hybrids and open‐pollinated varieties was immune to race 300. Conversely, among oilseed hybrids, 3% of them showed immunity, 12% highly resistant, 59% resistant and 26% showed susceptible reactions. Open‐pollinated varieties were the most susceptible to race 300 followed by confection and oilseed sunflower hybrids. Results from this study are projected to assist breeders in selection of hybrids and varieties against prevalent race as our results showed a diversity of resistance levels to race 300.