| Taking one of ten oil crops castor as the research object, and the varieties who have strong seed germination ability and strong stress resistance were chosen preliminarily from the thirteen different varieties by seed germination and high humidity and salt stress experiments, The results are as follows:1. Under the same salt concentration, the inhibition degree of germination energy and rate was CSR6.181 and Jin castor N0.2>zibo castor NO.5 and fen castor NO.7,and the best variety suitible for saline land cultivation was Jin castor NO.2.2. high humidity breeding1) the effect of humidity on the vegetative growthThere are obvious differences between plant height, ground diameter and branch high of thirteen different varieties in the different humidity conditions. In the plant height statistics, the variety of 12 had the highest plant height in the 95% humidity condition, and the same of 3,5,7,8 and 13 in the 85% humidity condition, and 6 of 75%,and 1,2,4,9,10 and 11 of 65%. In the ground diameter statistics, the variety of 6,7 and 12 had the highest ground diameter in the 95% humidity condition,3 and 13 of 85%,8 of 75%, and 1,2,4,5,9,10 and 11 of 65%. In the branch high statistics, the variety of 12 had the highest branch high in the 95% humidity condition,7 and 8 of 85%,3,6 and 13 of 75%, and 1,2,4,5,9,10 and 11 of 65%. Comprehensive analysis, the variety of 1,2,9,11,12 and 13 are resistance for high humidity.2) the effect of humidity on the reproductive growthStudy on the pollen viability and seed oil content of thirteen different varieties in four humidity conditions indicated that:the variety of 2 and 12 can both keep viability above 70%; the variety of 1,3,6,7,9,10,11,12 and 13 have the highest seed oil content in the 65% humidity condition, and there was a negative correlation between humidity and seed oil content. So, the variety of 4,5,9,10,12 and 13 are resistance for high humidity in the reproductive growth.3) the effect of humidity on the disease occurrenceThe main diseases of castor are botrytis cinerea, blight and wilt. Humidity had significant effect (P<0.01) on the disease index, and there was a positive correlation between humidity and disease index, the disease index increased with the increasing of humidity.3. the contrast test of castor varietiesThere was a very significant positive correlation between yield per unit area and single ear weight and oil content, and the same of single ear weight and oil content,and a significant negative correlation between yield per unit area and crown width. comprehensive evaluation showed that the variety of 11 is best,and next come 1,13,9 and 10,and the badest is 8. |
