Weevil resistance
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Cytochrome P450-dependent monooxygenases (P450s), constituting one of the largest and oldest gene superfamilies found in many organisms from bacteria to humans, play a vital role in the detoxification and inactivation of endogenous toxic compounds.
23p visilicon2711 20-08-2021 9 1 Download
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Cowpea [Vigna unguiculata (L.) Walp.] is an important tropical legume crop, its grain contains about 25% protein and 64% carbohydrate, therefore, it is also called as a vegetable meat. In storage, Callosobruchus maculatus, also called cowpea beetle, cowpea weevil or bruchid, is regarded as the most important and common pest of cowpea both in Africa and Asia. All vigna crops except rice bean are susceptible to bruchids. So in this context in the present study the 100 stabilized families in F6 generation of cross between cowpea and rice bean were evaluated.
10p trinhthamhodang1213 29-05-2020 4 0 Download
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The present investigation was carried out to analyse for the presence of α-amylase inhibitor gene which is responsible for resistance to rice weevil. A total of 30 simple sequence repeat (SSR) markers were used to study the genetic diversity among 30 wheat genotypes resistant to rice weevil. Among them, seventeen primers were found polymorphic on agarose gel and depicted the significant diversity among susceptible and resistant genotypes while rest thirteen primers were found monomorphic.
12p nguaconbaynhay5 16-05-2020 23 1 Download
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Insect resistance in crops represents a main challenge for agriculture. Transgenic approaches based on proteins displaying insect resistance properties are widely used as efficient breeding strategies.
13p vihamax2711 21-04-2020 8 0 Download
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Cowpea, [Vigna unguiculata (L.) Walp.] also known as blackeye pea, southern pea and lobia is one of the most important food legumes in the semi-arid tropics. With an average of 25% protein (on dry weight basis) in its seeds and tender leaves, cowpea is a major source of protein. In storage, Callosobruchus maculatus F. also called cowpea beetle, cowpea weevil or bruchid, is regarded as the most important and common pest of cowpea both in Africa and Asia. All vigna crops except rice bean are susceptible to bruchids.
6p caygaocaolon2 11-03-2020 14 1 Download
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The wheat varieties HD-2733 and K-307 were found moderately resistant against Sitophilus oryzae in which higher hardness, lower moisture, lesser eggs, progeny and population with longer developmental period and lesser grain weight loss and damaged grain were recorded. Rest wheat varieties found susceptible to Sitophilus oryzae. Hardness having negative association with pest infestation. While moisture showed positive relation. The fecundity and progeny were positive relation with percent weight loss and damaged grain.
12p caygaocaolon3 09-03-2020 11 1 Download
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Survey were conducted to collect storage pests such as red flour beetle, Tribolium castaneum and rice weevil, Sitophilus oryzae from twenty three different government storage warehouses of the Tamil Nadu. Phosphine resistance in T. castaneum ranged from 91.67 to 100 per cent while in S. oryzae ranged from 66.67 to 90 per cent. About 91.67 per cent of maximum phosphine resistance was recorded in Nagarkoil, TNCSC. Considering S. oryzae, highest resistance level (90%) was recorded in Trichy, TNCSC while Pudukkottai, TNCSC showed lowest resistance level (66.67 %).
8p cothumenhmong1 08-12-2019 6 0 Download
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Plant defensins are multifunctional small cysteine-rich proteins. They are active against fungi, bacteria, and many viruses, and they inhibit trypsin and α-amylase activities. In this study, we expressed the maize defensin gene (ZmDEF1) in tobacco seeds in order to establish the basis for generating transgenic maize plants resistant to weevils.
7p nutifooddau 27-01-2019 18 1 Download