Resistant evaluation of rice bacterial leaf streak and virulence differentiation of Xanthomonas oryzae pv.oryzicola in Jiangsu Resistance to Xanthomonas oryzae pv.oryzicola in Transgenic Rice Introduced Flagellin Gene Screening and detection of diagnostic molecular markers to distinguish Xanthomonas oryzae pv. oryzae from Xanthomonas oryzae pv. oryzicola