桂西南地区6个苹婆株系综合性状比较.

【Objective】The present paper aimed to compare overall characteristics of Sterculia nobilis Smith strains plantation in southwest Guangxi and provide a reference basis for qualified S. nobilis Smith strains screening and species cultivation.【Method】Comprehensively compare and investigate the flowering and fruiting habits,agronomic traits,stress resistance,and economic traits of six excellent strains of S. nobilis Smith planted in southwest Guangxi(NY2,LH2,SK14,SJ30,BJ32,and BJ33),and evaluate other traits,including yield and fruit quality,of the six strains by DTOPSIS.【Result】There were some differences in flowering and fruit habits,agronomic traits,stress resistance and fruit traits among different lines. Among them,SK14(14.86 kg) and BJ33 strains(14.50 kg) showed the highest yield per plant,without significant difference(P>0.05,the same as below),which were significantly higher than the other four strains(P<0.05,the same as below).No significant differences were found in yield per plant among the four strains. The single fruit weight of SK14(65.3 g) was the heaviest,extremely significantly heavier than that of NY2,LH2 and BJ32 strains(P<0.01,the same as below),and significantly heavier than that of SK14 and SJ30 strains. BJ32 had the highest seed production rate(58.6 %),which was extremely significantly higher than NY2,SK14 and SJ30 strains,and significantly higher than BJ33 strain. The single seed weight of SK14 was only 5.90 g,which was extremely significantly lower compared with the other five strains. The differences among the five strains were not significant. NY2 had the lowest pod boring rate(5.2 %),extremely significantly lower than SK14 strain,and significantly lower than LH2,BJ32 and BJ33. The starch content of SK14 was the highest(65.899 %),which was very significantly higher than that of NY2,LH2,SJ30 and BJ32 strains. The soluble sugar content of BJ32 was the highest(27.496 %),extremely significantly higher than that of NY2,LH2 and BJ33 strains,and significantly higher than that of SK14 and SJ30 strains. The soluble protein content of SJ30 was the highest(11.808 mg/gFW),which was very significantly higher than that of BJ33. No significant differences were found in soluble protein content among SJ30,NY2,LH2,SK14 and BJ33. DTOPSIS evaluation demonstrated that BJ33 had the highest score,C_i was 0.8336,and the optimal comprehensive characters.【Conclusion】BJ33 has strong tree vigor, high yield, filled fruit, big seed, high seed production rate, good quality and taste. It has the optimal comprehensive evaluation and can be developed as good S. nobilis Smith variety. SK 14, BJ 32 and NY2 has fine performance on single trait, and can be used as genetic resources in variety improvement. [ABSTRACT FROM AUTHOR]