A preliminary study on the crossability in Robinia pseudoacacia L.

作者：Lu, Nan; Dai, Li; Wu, Bo; Zhang, Yue; Luo, Zijing; Xun, Shouhua; Sun, Yuhan^*; Li, Yun

来源：Euphytica, 2015, 206(3): 555-566.

DOI：10.1007/s10681-015-1458-4

• Robinia L.
• Crossability
• Pollen tube
• Fruit setting rate

To explore the feasibility of intra specific hybridisation between Robinia pseudoacacia (common diploid) and other Robinia varieties, tetraploid R. pseudoacacia, R. pseudoacacia var. decaisneana (Carr.) Voss., R. pseudoacacia Frisia, and R. pseudoacacia "Idaho'' were collected as male parents, and hybridisation trials were conducted over a period of three consecutive years. The average seedling emergence rates of the five hybridised combinations were similar to 2.3,2.0, 3.3, 1.3, and 0 % per year, respectively. To ensure maximum seedling emergence rates, we found that the best pollinating times were the blooming days. To investigate the causes of low crossability, we also examined pollen-tube growth and fruit setting rates. The results indicated that the causes of low crossability were abnormal pollen-tube growth, failed development of fertilised ovule, and poor seed germination. Low fruit-setting rates caused by emasculation may also lead to low crossability.

• 出版日期2015-12
• 单位北京林业大学