水稻品种游离氨基酸含量与抗褐稻虱的关系

ON RELATIONSHIP BETWEEN THE FREE AMINO ACIDS CONTENT AND RESISTANCE TO NILAPARVATA WGENS IN RICE VARIETIES

本研究测定了4个水稻品种在三个秧龄期对褐稻虱的抗性及其游离氨基酸含量。结果表明,感虫品种TN1叶鞘的主要游离氨基酸含量和氨基酸总量均高于抗虫品种7105,中抗品种的含量一般居中。分析各品种不同秧龄期的氨基酸含量与品种受害级别、飞虱排泄蜜露量、产卵量和存活率的相关性,苯丙氨酸、缬氨酸、谷氨酸、异亮氮酸与上述四项指标呈显著正相关;天门冬酰胺、亮氨酸、天门冬氨酸以及各种氨基酸的总量与其中三项指标呈显著正相关;另外还有七种氨基酸与其中1～2项指标呈显著正相关,此外,腊膜取食试验表明,天门冬酰胺、缬氨酸、丝氨酸、亮氨酸、苯丙氨酸对褐稻虱的取食均有不同程度的刺激作用。

The resistance to Nilaparoda(BPH)in 4 rice varieties at 30,45,60-days old plants and the correlations between the content of various free amino acids taken in rice sheath and 4 resistant parametrics including damage rating,amount of honeydew excreted;nymph survival and fecundity were studies.The results indicated that the total content and the content of mainly free amino acids in susceptible variety TN1 were higher than resistant variety 7105 in different growth ages.Generally the total content of free amino acids in the moderate resistant varieties Baosyan 2 and Fubaoai 21 were higher than in 7105 but lower than in TN1.The positive correlations significantly existed between the content of 4 amino acids (phenylalanine,Valine,glutamic acid and boleucine) and 4 resistant pararnetrics,also existed between the content of other 3 amino acids (asparagine,aspartic and leucine ) and 3 resistant pararnetrics.Otherwise,the result of feeding test showed that 5 kinds amino acids (asparagine,valine,leucine,serime and phenylalanine) have a significant pgagostimulative effect on the BPH fedding.