Cabbage was widely planted in china for its abundant nutrition and special flavor. It has been extensively investigated for plant genetic engineering. Bt genes were derived from Bacillus thuringiensis, and their toxin...
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Cabbage was widely planted in china for its abundant nutrition and special flavor. It has been extensively investigated for plant genetic engineering. Bt genes were derived from Bacillus thuringiensis, and their toxin proteins could kill lepidopters specifically but were harmless to higher animal and human being. Thereby, it was of potential to obtain insect-resistance resource by introducing Bt gene into cabbage. The hypocotyl segments of cabbage (Brassica oleracea var. capitata cv. Zhonggan-8 and Niuxin) sterile seedlings were used as explants in this experiment. Through
The brown planthopper (BPH), Nilaparvata lugens Stl, is a devastating sucking insect pest of rice (Oryza sativa L.) throughout the world. Resistance to BPH is an important breeding objective in rice improvement. Bph15...
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The brown planthopper (BPH), Nilaparvata lugens Stl, is a devastating sucking insect pest of rice (Oryza sativa L.) throughout the world. Resistance to BPH is an important breeding objective in rice improvement. Bph15 is one of the major BPH resistance genes so far identified in several indica rice and wild relatives. In previous studies, Bph15 was identified in an introgression line B5 and mapped on the, region near the centromere of chromosomes 4 flanked by RFLP markers C820 and S11182.
The planthoppers (Homoptera: Delphacidae), brown planthopper (Nilaparvata lugens Stl, BPH)and whitebacked planthopper.(Sogatella furcifera, WBPH) are themost serious pests of rice, which pierce their stylets into rice...
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The planthoppers (Homoptera: Delphacidae), brown planthopper (Nilaparvata lugens Stl, BPH)and whitebacked planthopper.(Sogatella furcifera, WBPH) are themost serious pests of rice, which pierce their stylets into rice phloem and suck the nutrient liquid, interfering with the translocation of photosynthates from source to sink, affecting plant growth and development. Previous researches showed that rice response to WBPH and BPH feeding varies and WBPH feeding affects plant height while BPH feeding affects root growth, and WBPHis smaller and its sucking rate is less than that of BPH but its effect on rice plant growth processes is the same or greater than that of BPH.
The insect pest Brown planthopper (BPH)is one of the key constraints on increasing rice production. Growth, development and reproduction of BPH are very different when the insects feed on rice varieties with different...
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The insect pest Brown planthopper (BPH)is one of the key constraints on increasing rice production. Growth, development and reproduction of BPH are very different when the insects feed on rice varieties with different, resistance levels. To investigate the molecular response of BPH to ingestion of BS, a highly resistant rice line, and MH63, a moderately resistant rice variety, cDNA-amplified fragment length polymorphism (cDNA-AFLP): experiments were firstly carried out to analyze the differentially expressed transcripts in the fourth instar BPH nymphs. Compared with that in BPH reared on susceptible rice susceptible rice Taichung Native 1 (TN1), of 2800 transcripts analyzed, 76 cDNA bands, were up-regulated and eight bands down-regulated
Perennial ryegrass is clearly one of the most important and widely used forage and turf grasses, exhibiting rapid establishment, good tillering ability and high acceptability to *** genetic relationship of 16 ryegrass...
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Perennial ryegrass is clearly one of the most important and widely used forage and turf grasses, exhibiting rapid establishment, good tillering ability and high acceptability to *** genetic relationship of 16 ryegrass cultivars, including 2 accessions annual cultivars and 14 entries perennial cultivars, from different breeding company were analysed using 61 RAPD markers. 61 RAPD primers generated 408 bands, of which 367 bands (89.95%) were polymorphic;It showed that the genetic polymorphism in these cultivars was very low, the coefficient among the cultivars fell between 50%～95%;Dendrograms obtained using this molecular markers are not in agreement with their separated morphologic character. High correlation was not obersved between the two annual ryegrass *** from the same company were not clustered in one *** breeding method of perennial ryegrass was discussed.
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