1Study of DNA extraction and genetic diversity in grimmiaceaeZHANG Han, Gao Yong-chao, SHA Wei, LI Ru-yu, DAI Shuang7-92Variant germplasm obtained by pollen tube pathway technique and SSR analysisWANG Fu-rong, ZHANG Chuan-yun, LIU Guo-dong, LIU Ren-zhong, LIU Qin-hong, ZHANG Jun10-123Screening of optimum substrate combination for Zoysia matrellia shoot tip culture13-154Stem tissue culture of seedless watermelon Huaxia 115-16,295Classification of wheat plant typesZHANG Qi-lu, CHEN Xiang-zhi, ZHANG Li-quan, LI Xiang-kui, WANG Jia-sheng17-196Comparative analysis of isoflavone content in some soybean varieties in Shandong province19-207Classification of cross-incompatibility groups and application in breeding of sweet potatoWANG Jian-ling, LIN Zu-jun, WANG Chang-yun, XIN Guo-sheng, WANG Dong-mei21-238Principal component analysis and cluster analysis on main quality characteristics of wheat in Huang-huai winter wheat region24-269Variety comparison test of spring chinese cabbage27-2910Breeding of Liaomai 16 and indices of the Super-high-yield wheat breeding modeZHAO Ping, GUO Xiu-huan, LIU Hong-wei, LI Jun, LIAN Guang-yan, WANG Chun-yun, REN Wei-guo30-3211Effect of aging time on some physiological and biochemical indices in radish early developmentXU Wen-Ling, WANG Long-zhi, ZHANG Chuan-kun33-3612Effect of environment factors on the growth of Pleurotus abalones36-3813Study on biphasic growth mechanism of garlic39-4214Effect of Pb and Cd in calcareous brown soil on the growth and yield of chinese mustard43-4515Micro-climate in bag and its effect on the quality and yield of watermelon46-4716Effect of substrate poral lacuna characteristics on cutting effect of Pelargonium hortorum48-49,5317Effects of different ratios of nitrogen, phosphorus and potassium in nursing media on growth and quality of tomato plug seedlingsFEI Su-e, WANG Xiu-feng, LIU Ji-gang50-5318Effect of subsurface drip irrigation on leek yield and explosion of Bradysia odoriphaga54-5619Present situation and control measures of Erisosma lanigerum in Shandong province56-5720Explosion of shaggy cap black spot in large area of Shandong province58-59 