3 years ago

The correlation between wheat black point and agronomic traits in the North China Plain

Qiao-yun Li, Qiao-qiao Xu, Yu-mei Jiang, Ji-shan Niu, Kai-ge Xu, Rui-shi He

Publication date: Available online 8 January 2019

Source: Crop Protection

Author(s): Qiao-Yun Li, Qiao-Qiao Xu, Yu-Mei Jiang, Ji-Shan Niu, Kai-Ge Xu, Rui-Shi He

Abstract

Black point is an economically serious disease in cereals that affects crop yield and value, the incidence of which is known to vary with environmental conditions and fungal load. However, little is known about the genotypic differences in susceptibility towards the disease. We studied the correlations between 35 agronomic traits and the incidence of black point, using 48 representative wheat genotypes selected from a total of 403 genotypes. These 48 genotypes were inoculated with fungi and cultivated under field conditions during 2016–2018 in the North China Plain. The results showed that the incidence of black point varied across genotypes, fungal isolates, and years. First, we screened 28, 23, 19, and 23 genotypes susceptible or resistant to black point caused by Bipolaris sorokiniana, Alternaria alternata, Fusarium equiseti, and under natural field conditions, respectively. The correlations between black point incidence and agronomic traits were analyzed using the screened wheat genotypes. We found a positive correlation between incidence and filling stage (r = 0.652) and a negative correlation between incidence and freezing resistance (r = −0.613) during the three years. In addition, black point incidence was correlated with thousand grain weight, heading date, seedling habits, awn length, and glume opening; however, these associations varied across years and different fungal isolates. Black point incidence was not strongly associated with most of the agronomic traits studied, thus indicating that this disease was greatly affected by environmental factors. However, black point incidence was likely to be lower in genotypes with adequate freezing resistance and short filling stage. These results provide some markers of agronomic traits for breeders to improve the selection efficiency of high-yielding wheat varieties that are resistant to black point.

Graphical abstract

Image 1

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.