It 's generally tough to develop a seedless fruit-bananas and oranges are rare successes .
培育无籽水果通常是很困难的香蕉和橙子是罕见的成功例子。
It is a seedless type orange .
这是一种无核橘。
Research on the expansion effect of gibberellin on flame seedless grape .
赤霉素对火焰无核葡萄膨大效果的研究。
The main points of culture technics of flame seedless grape .
火焰无核葡萄的栽培技术要点。
The dynamic changes of the fruit and ovule weight of four seedless grape cultivars were analyzed , and the effects of different inoculation time on embryo germination were studied .