A Study On The Chilling-resistance Of Hybrid Combination-Yueyou 9113

Through the different dates of seeding and transplanting, controlled temperature (19℃),economic traits of the hybrid combinations—Yueyou 9113, Yueyou 63 and Jinyou207 indifferent temperature was analyzed in order to explore the low temperature sensitivitycharacteristic and the mechanic of the hybrid combination—Yueyou 9113, and provide proofsfor large areas practices product, take advantage of the potent of the production and ensurestability of the high output. Meanwhile, the content of chlorophyll and MDA was mensuratedin the stage of full bloom,milk and yellowripe in this experiment. According to standards ofthe Lin Deng-hao, we discussed the three combinations's basis of Chilling-resistance in termsof physiology in later growth period. The main results are as follows: The chilling-resistanceof Yueyou 9113 and CK(Jinyou207) are the same, that is attain the fifth grade, Yueyou 63'sattain the ninth grade, the Chilling-resistance of Yueyou 9113 is superior to the Yueyou 63's,chlorophyll content is higher in the later growth and development period, which close to theJinyou20's, and chlorophyll content is 2.496mg/g. FW in the yellowripe stage, which is 3.8times greater than the Yueyou 63,lower content of the MDA. The experiment of seeding andtransplanting in different dates, the variation of the economic traits and the yield characters ofthe Yueyou 9113 are familiar with the jinyou207, Yueyou 9113's variation coefficient of thedifferent traits are less and relative of seed setting rate is higher when compared with theYueyou 63. During the experiment of different dates of seeding and transplanting, Yueyou9113 has a shorten growth and development period when we delayed the date of seeding. Onthe other hand, Yueyou 9113 has prolong growth and development period when we delayedthe date of transplanting. During the eight treatments, the output is the tiptop when theseeding date is June 23rd and the transplanting date is July 15th (A₃B₁),and increase production14 percentage when compared with A₄B₁. There have higher the effect tiller number, thewhole grains per panicle and the seed setting rate in production factors. From what had beenanalyzed, we can say that Yueyou 9113 has strong ability of the Chilling-resistance and broadadaptation in practically product. Meanwhile, we can increase the Yueyou 9113'schilling-resistance through the different agronomic practices product, such as reasonable arrange the date of sowing, scientific fertilizer and so on. In order to get the higher yield andbenefit.