SRX17962474 LP pool SRP403577 bp0 young leaves of Xiangchanglu with long pods in F2 generation SRS15479032 long pod pool LP pool WGS GENOMIC PCR HiSeq X Ten SRX17962475 SP pool SRP403577 bp0 young leaves of Xiangchanglu with short pods in F2 generation SRS15479033 short pod pool SP pool WGS GENOMIC PCR HiSeq X Ten