A feeding test to identify rice varieties resistant to the leaf folder,Cnaphalocrocis medinalis (Guenee)

1990 ◽  
Vol 99 (6) ◽  
pp. 483-491 ◽  
Author(s):  
J S Bentur ◽  
M B Kalode
Keyword(s):  
Cnaphalocrocis Medinalis ◽  
Rice Varieties ◽  
Feeding Test

Nature of resistance in rice varieties against leaffolder Cnaphalocrocis medinalis (Guenée)

1993 ◽  
Vol 14 (01) ◽  
pp. 107-114 ◽  
Author(s):  
K. Dakshayani ◽  
J. S. Bentur ◽  
M. B. Kalode
Keyword(s):  
Cnaphalocrocis Medinalis ◽  
Rice Varieties

scholarly journals Transcriptomic and Metabolomic Responses of Rice Plants to Cnaphalocrocis medinalis Caterpillar Infestation

Insects ◽  
2020 ◽  
Vol 11 (10) ◽  
pp. 705
Author(s):  
Yuqi Wang ◽  
Qingsong Liu ◽  
Lixiao Du ◽  
Eric M. Hallerman ◽  
Yunhe Li
Keyword(s):  
Gene Expression ◽  
Transcriptional Response ◽  
Vital Role ◽  
Cnaphalocrocis Medinalis ◽  
Rice Varieties ◽  
Rice Plants ◽  
Rice Leaf Folder ◽  
Genes Encoding ◽  
Transcriptional Changes ◽  
Metabolome Profiling

Interactions between plants and insect herbivores are important determinants of plant productivity in cultivated and natural agricultural fields. The rice leaf folder (Cnaphalocrocis medinalis) causes tremendous damage to rice production in Asian countries. However, little information is available about how rice plants defend themselves against this destructive pest at molecular and biochemical levels. Here, we observed the transcriptomic and metabolomic differences in rice leaves after 0, 1, 6, 12, and 24 h of being fed by C. medinalis using RNA sequencing and metabolome profiling. Transcriptional analyses showed that gene expression responds rapidly to leaf folder infestation, with the most significant transcriptional changes occurring within 6 h after the initiation of feeding. Metabolite abundance changed more slowly than gene expression. Gene Ontology and Kyoto Encyclopedia of Genes and Genomes enrichment analyses indicated that the rice transcriptional response to infestation involved genes encoding protein kinases, transcription factors, biosynthesis of secondary metabolites, photosynthesis, and phytohormone signaling. Moreover, the jasmonic acid-dependent signaling pathway triggered by leaf folder herbivory played a vital role in rice defense against this pest. Taken together, our results provide comprehensive insights into the defense system of rice to this species and may inform the development of insect-resistant rice varieties.

Resistance of Cultivated Rice Varieties to Cnaphalocrocis medinalis (Lepidoptera: Pyralidae)

2010 ◽  
Vol 103 (4) ◽  
pp. 1166-1171 ◽  
Author(s):  
Jie Xu ◽  
Qi-Xiang Wang ◽  
Jin-Cai Wu
Keyword(s):  
Cnaphalocrocis Medinalis ◽  
Cultivated Rice ◽  
Rice Varieties ◽  
Lepidoptera Pyralidae

Studies on the yield abilities of the rice varieties in Japan : Continued

1948 ◽  
Vol 17 (1) ◽  
pp. 17-20 ◽  
Author(s):  
Isamu Morimoto
Keyword(s):  
Rice Varieties

Glycaemic responses to glucose and rice in people of Chinese and European ethnicity

2020 ◽  
Author(s):  
M Kataoka ◽  
BJ Venn ◽  
SM Williams ◽  
Lisa Te Morenga ◽  
IM Heemels ◽  
...  
Keyword(s):  
Ethnic Differences ◽  
Rice Variety ◽  
Glycaemic Index ◽  
Activity Levels ◽  
Glycaemic Response ◽  
Rice Varieties ◽  
Adjusted Risk ◽  
Postprandial Glycaemia ◽  
Adjusted Risk Ratio ◽  
Glucose Curve

Aims: Diabetes rates are especially high in China. Risk of Type 2 diabetes increases with high intakes of white rice, a staple food of Chinese people. Ethnic differences in postprandial glycaemia have been reported. We compared glycaemic responses to glucose and five rice varieties in people of European and Chinese ethnicity and examined possible determinants of ethnic differences in postprandial glycaemia. Methods: Self-identified Chinese (n = 32) and European (n = 31) healthy volunteers attended on eight occasions for studies following ingestion of glucose and jasmine, basmati, brown, Doongara® and parboiled rice. In addition to measuring glycaemic response, we investigated physical activity levels, extent of chewing of rice and salivary α-amylase activity to determine whether these measures explained any differences in postprandial glycaemia. Results: Glycaemic response, measured by incremental area under the glucose curve, was over 60% greater for the five rice varieties (P < 0.001) and 39% greater for glucose (P < 0.004) amongst Chinese compared with Europeans. The calculated glycaemic index was approximately 20% greater for rice varieties other than basmati (P = 0.01 to 0.05). Ethnicity [adjusted risk ratio 1.4 (1.2-1.8) P < 0.001] and rice variety were the only important determinants of incremental area under the glucose curve. Conclusions: Glycaemic responses following ingestion of glucose and several rice varieties are appreciably greater in Chinese compared with Europeans, suggesting the need to review recommendations regarding dietary carbohydrate amongst rice-eating populations at high risk of diabetes. © 2012 Diabetes UK.

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