PRELIMINARY ANALYSIS ON FERTILITY CHANGES AND ADAPTABILITY OF HPGMR AT DIFFERENT ALTITUDES IN YUANJIANG
Zhang Ziguo; Yuan Shengchao; Zen Hanlai; Li Yuzhen, (Huazhong Agricultural University, Wuhan 430070) Li Zichen; Wei Cunlong, (Yuanjiang Agriculture Institute, Yunnan Province 653300)
Analysis on fertility changes in 2 indica and 5 japonica HPGMR lines, photoperiodand temperature at different altitude in Yuanjiang shows that N5047S and W7415S ex-hibited fertility changes at 4 spots from altitude of 400m to 1600m above sea level;while W6154S, 6334S, Nongken 58S, 31111S and WD1S showed fertility changesat 2 spots 400m and 800m above sea level, it showed no fertility changes ataltitude of 1230m and 1600m. In approximately same photoperiod condition, fertilitychanges differed in different altitudes as temperature changes. Apart from photoperiod,temperature was another important factor in inducing fertility changes of HPGMR. Thephotoperiod and temperature conditions inducing fertility changes among HPGMR lineswere different. There were supplementary effect and interactions betweem photoperiodand temperature. The significance of the correlation between the fertility% of japonicaHPGMR lines and daylength showed that photoperiod was the maior factor in inducingfertility changes in japonica HPGMR lines. The correlation between fertility% ofW6154s and temperature is of significance, temperature is the mainly inducing factor.The critical photoperiod and critical temperature inducing fertility changes in HPGMRaffected each other and might alter. This alteration is the basis that HPGMR may beused in wider region.