摘要
[Objectives]The genetic characteristics of wild germplasm resources of Saccharum spontaneum L.were further investigated to provide a scientific theoretical basis for the improved hybridization of sugarcane varieties.[Methods]The first flowering date data of 112 wild resources were statistically analyzed by broad heritability for 3 consecutive years,and pollen quantity and yield were investigated to provide reference for hybridization.[Results]The broad heritability of the first flowering date of S.spontaneum was 0.079.The differences in the first flowering date between the S.spontaneum resources were in the range of 4-49 d,with an average of 13.65 d.The inter-annual changes within 20 d accounted for 90 %,and only 4.5% exceeded 30 d.The first flowering dates of some S.spontaneum resources were obviously postponed after being treated.[Conclusions]In the hybridization season,the hybridization plan must be adjusted according to the actual situation of the flowering period to make full use of it.
[Objectives] The genetic characteristics of wild germplasm resources of Saccharum spontaneum L. were further investigated to provide a scientific theoretical basis for the improved hybridization of sugarcane varieties. [Methods] The first flowering date data of 112 wild resources were statistically analyzed by broad heritability for 3 consecutive years, and pollen quantity and yield were investigated to provide reference for hybridization. [Results] The broad heritability of the first flowering date of S. spontaneum was 0.079. The differences in the first flowering date between the S. spontaneum resources were in the range of 4-49 d, with an average of 13.65 d. The inter-annual changes within 20 d accounted for 90 %, and only 4.5% exceeded 30 d. The first flowering dates of some S. spontaneum resources were obviously postponed after being treated. [Conclusions] In the hybridization season, the hybridization plan must be adjusted according to the actual situation of the flowering period to make full use of it.
基金
Supported by Supported by the Earmarked Fund for China Agriculture Research System(CARS-170107)
National Natural Science Foundation of China(31701488)
NSFC General Project(31571730)
Genetic Diversity Analysis and Core Germplasm Construction of Chinese Sugarcane Parents(2017A030303049)
Special Fund for Construction of Innovation-Driven Development Ability of Guangdong Academy of Sciences(2017GDASCX-0105)
Guangdong Key Laboratory of Sugarcane Improvement and Biorefinery(2017B030314123)
