Isolation and Expression Patterns of TaPHYA Gene Subfamily in Common Wheat Differential Expression Analysis of Transcripts at Early Developmental Stage of Male Inflorescence Mutant of White Birch(Betula platyphylla)by cDNA-AFLP Isolation and Expression of Flowering Locus T(FT) Gene in Betula platyphylla Isolation and Expression of APETALA2 Transcription Factor Gene in Betula platyphylla Specific Expression of BnDGAT1 Gene in Brassica napus