Programmed Cell Death during Abortion of Microspore in S-type Cytoplasmically Male-sterile Maize Differences between Maize and Wheat for Non-photochemical Quenching (qN) during Photosynthetic Induction Relationship between Distribution of 14C-assimilates and Kernel Abortion in Maize Detection of Quantitative Trait Loci for Plant Height in Different Photoperiod Environments Using an Immortalized F2 Population in Maize Proteomic Analyses of the Maize Cross Incompatibility Gene Ga1-S Regulation Mechanism of Intracellular IP3-Ca2+ on Photosynthesis in Maize Seedlings under UV-B Stress Cloning and Expression Analysis of Heat Shock Protein Gene ZmHSP90-1 in Maize