SSR标记定位一个新的小麦白粉病抗性基因

doi:10.7668/hbnxb.2008.05.028

摘要/Abstract

摘要： 来源于簇毛麦与普通小麦杂交后代的稳定小麦品系101-3含有1个新的抗白粉病显性基因，暂命名为PmX，用单体分析的方法已定位于染色体6B上。以感白粉病小麦品种中国春与101-3杂交后代F2 为材料，用65对6B染色体上和9对6A染色体上小麦微卫星引物，进行连锁分析，发现小麦微卫星标记Xgwm570与基因的遗传距离为(9.72±2.0) cM，该结果表明，该基因位于小麦染色体6BL上，同时也为分子标记辅助育种上利用该基因提供了初步的选择标记。

关键词: 小麦, 白粉病, 抗性基因, SSR

Abstract: The waterproof installations were carried out to deal with the content of soluble protein and free proline of different boll weight genotypes and inner positions in cotton under water stress.The results showed that the content of soluble protein at different positions appeared different trends for these genotypes under the two treatments,it illustrate that different position had different capacities of adaptation to drought stress.Under water stress,the soluble protein content which in each positions were decreased in these genotypes at the wholestage,the big-boll and small boll varieties in lower branch leaves showed less accumulation of soluble protein content,the change of the content of soluble content in middle branch leaves was smaller than the lower one for each genotype which showed that the physiological characters of the branch leaves was more stable in the boll development.Under drought stress,the free proline content at each branch leaves showed more accumulation than the CK,the big-boll variety had more accumulation of the content of free proline in each poison.The free proline content in the lower branch leaves was the most,and then the middle ones,the upper ones was the least.Different varieties had different regulation mechanism in the condition of drought,so free proline can be considered as a physiological index nearly correlative to drought of cotto.

Key words: Cotton, Genotype, Water stress, Soluble protein, Proline

中图分类号:

S35.121

唐媛, 傅体华, 贾明娟. SSR标记定位一个新的小麦白粉病抗性基因[J]. 华北农学报, 2008, 23(5): 127-130. doi: 10.7668/hbnxb.2008.05.028.

TANG Yuan, FU Ti-hua, JIA Ming-juan. SSR Marker of a Novel Wheat Powdery Mildew Resistance Gene[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2008, 23(5): 127-130. doi: 10.7668/hbnxb.2008.05.028.

http://www.hbnxb.net/CN/Y2008/V23/I5/127

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