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Crop and Pasture Science Crop and Pasture Science Society
Plant sciences, sustainable farming systems and food quality
Crop and Pasture Science

Crop and Pasture Science

Volume 73 Number 11 2022

CP21639Comparative study on the fertility and outcrossing characteristics of new dual-purpose genic male-sterile rice in China

Jing Chen 0000-0002-0046-2542, Yan Chen, Yuping Luo, Yanran Wu, Yan Peng, Dandan Mao, Manzhong Liang, Xiaojun Dai and Liangbi Chen
pp. 1213-1228

‘Two-line’ hybrid rice plays an important role in ensuring global food security. However, fertility instability and low hybrid seed production of sterile lines are urgent problems. In order to increase the stability of pollen sterility, we compared the low-temperature tolerance of fertile pollen development and outcrossing characteristics of new dual-purpose genic male-sterile lines and provide a new breeding standard of dual-purpose male-sterile lines which promotes the sustainable development of two-lines hybrid rice.


In recent years, alternative rice cultivation methods have been widely developed in Asia. Realising the yield potential and raising the ceiling of yield potential even further have been the production priorities of direct-seeded rice cultivation. To establish cultivation methods for direct-seeded rice and to develop breeding targets for further increases in yield, an evaluation of their yield potential and growth characteristics is essential.


Optimising nitrogen (N) fertiliser management in rice crops is critical to sustaining production while minimising environmental impacts. Using 15N-labelled urea, we found that ∼50% of applied N fertiliser was taken up by rice plants (straw + grain), with a further 20% retained in roots and soil. This indicates that N fertiliser use efficiency in drill-sown rice is similar to that of dryland cereal crops in Australia when best management practice guidelines for N fertiliser use are followed.

CP22039QTL detection for grain yield and micro-nutrition contents in rice (Oryza sativa) using an interspecific backcross population derived from Dongxiang wild rice (Oryza rufipogon)

Liuying Duan, Ting Wu, Xia Li, Derun Huang, Xiaobai Li, Xixian Wen, Ping Chen, Jiankun Xie and Biaolin Hu 0000-0003-4357-3311
pp. 1253-1263

Enhancing grain yield and micro-nutrition contents in rice (Oryza sativa L.) through biofortification breeding is an efficient way to address micro-nutrient deficiencies in human. A total of 16 and 29 QTLs for grain Zn, Mn and Cu contents, and for grain related traits, respectively, were identified using a backcross inbred lines (BIL) derived from an interspecific backcross between O sativa and Oryza rufipogon Griff. These candidate QTLs could be useful for the improvement of grain yield and micro-nutrients through QTL pyramiding.

CP21810Evaluation of performance and stability of new sources for tolerance to post-emergence herbicides in lentil (Lens culinaris ssp. culinaris Medik.)

Rind Balech 0000-0002-8786-528X, Fouad Maalouf 0000-0002-7642-7102, Somanagouda B. Patil, Kamal Hejjaoui, Lynn Abou Khater, Karthika Rajendran 0000-0003-4175-2463, Diego Rubiales 0000-0001-9644-8616 and Shiv Kumar
pp. 1264-1278

The integration of herbicide-tolerant lentil in the cropping system increases its sustainability and soil fertility in West Asian and North African regions. Therefore the identified sources for herbicide tolerance combined with other traits can be used to develop new cultivars that can be adapted to modern cropping systems in the region. The cultivars can decrease the cost of the production by reducing the cost of laborious hand weeding.

CP22002Genome-wide identification and expression profile analysis of the OMT gene family in response to cyst nematodes and multi-abiotic stresses in soybean

Kezhen Zhao, Kuanwei Yu, Xue Fu, Xunchao Zhao, Ning Xia, Yuhang Zhan, Xue Zhao 0000-0003-3362-1471 and Yingpeng Han 0000-0002-9829-6588
pp. 1279-1290

O-Methyltransferase is a key regulatory factor in plants and plays an important role in biotic and abiotic stresses. In this study, the OMT gene family in soybean was identified and transcriptome expression analysis was performed based on abiotic stress and soybean cyst nematode stress. The response of two genes, GmCCOMT3 and GmCCOMT7 to soybean cyst nematode was verified by fluorescence quantification.


Current agronomic practices and rotations appear to be effective in controlling common root pathogens and plant parasitic nematodes in southwest Australian dryland cropping systems. But recent changes in rotations and agronomy have altered pathogen and plant parasitic nematode dynamics. We found low weed populations and early sowing reduced persistence of pathogens studied, but use of high rates of herbicide, increased frequency of cereals and canola at the expense of lupin and increased N fertiliser use had the opposite effect.


Herbicide resistant weeds are a major threat to crop production, with annual ryegrass being the major species of concern in Australia. Surveys of south-eastern Australia conducted over a 5 year period found over 60% of populations were resistant to two or more herbicide groups and only 15% of ryegrass populations were susceptible to all tested herbicides. The high level of resistance found across south-eastern Australia highlights the need for farmers to adopt non-herbicide practices, in conjunction with herbicides, to control this species.


Understanding weed seedling emergence process is very important for researchers and producers to design successful weed management strategies reducing weeds population. In some weeds, seed dormancy is defined during seed development in mother plant, and allows weeds to increase the emerge windows and avoid controls. In our work, we found that the reduction in solar radiation received by the mother plant diminished seed dormancy level which should be considered by producers to establish weed management strategies in the next season.

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