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Articles by Sher Hassan
Total Records ( 2 ) for Sher Hassan
  Mohammad Arif and Sher Hassan
  Soybean germplasm found resistant to two SMV isolates through mechanical inoculation under screen house conditions were exposed to field conditions. Among 13 soybean varieties, Malakand-96, Bryan and Sherman had no symptoms and no virus was detected by ELISA. Wahab-93, Lugan, Hobbit, Kingsay, Harper, Nare, NARC-V and Clark developed mild mosaic and light veinal chlorosis on a few young leaves. Rincondita and Swat-84 exhibited mosaic and vein clearing on many young leaves. Among soybean lines, GC-81083-63, GC-81084-51, GC-80072-2-6, AGS-253 and AVRDC-13, no visible host reaction was observed. On AVRDC-12 and AVRDC-15 responded mild mosaic symptoms were observed on a few leaves. Malakand-96, Bryan and Sherman and GC-81083-63, GC-81084-51, GC-80072-2-6, AGS-253 and AVDRC-13 lines were re-tested in screen house conditions by inoculating isolate S1 through green peach aphids (Myzus persicae). Three soybean varieties and four lines exhibited a mild mosaic on young leaves. A low virus titre was reported in resistant soybean germplasm.
  Mohammad Arif , Muazam Stephen and Sher Hassan
  Soybean mosaic potyvirus (isolates S1 and P1) caused significant reduction in plant height, number of pods/plant, pod length, number of grains/pod and 100 grains weight in mechanically inoculated eight soybean varieties. The reduction in plant height of varieties Recondita, Ajmiri, Kingsay, Weber-84, Swat-84, Epps, Malakand-96 and Kharif-93 due to S1 isolate was 14.9, 15.2, 9.5, 11.0, 45.0, 14.5, 5.2 and 21.1 %, respectively. While in case of P1 isolate the reduction was 6.3, 29.5, 6.0, 47.6, 34.4, 26.2, 1.8 and 15.8 %, respectively. Analysis of variance of the yield components indicated that both isolates (S1 and P1) caused a significant reduction in pod length of all eight varieties. A –4.2 to 23 % reduction occurred in pod length due to S1, while –5 to 24 % reduction was observed in case of P1 isolate. Isolate S1 caused 1.5 to 68.6 % and P1 6.6 to 31.1 % reduction in number of pods per plant. SMV-S1 and P1 caused significant reduction in number of grains per pod. However, the percent reduction due to S1 was 4.8 to 24.7 %, while reduction due to P1 was 10.5 to 29.3 %, respectively. Both isolates affected the weight of grains significantly. The percent reduction was 5.3 to 21.7 and 7.3 to 20 due to SMV-S1 and P1 isolates, respectively.
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