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| Effectiveness Analysis of Pinus caribaea Top Grafting on Interstocks of P.elliottii |
| LIN Changming,ZHONG Suiying,WANG Zhe,ZHAO Fencheng,YE Weifang,TAN Zhiqiang,LI Yiliang,GUO Wenbing |
| (Hongling Seed Orchard;Guangdong Provincial Key Laboratory of Silviculture,
Protection and Utilization) |
| Abstract: |
| Grafting has been an important approach to
breeding. At Hongling Seed Orchard, Taishan, Guang-
dong Province, three 12-year-old slash pine clones
from genetically superior seed orchards “Elite” were
grafted with shoot tips of 17 clones from three Pinus
caribaea varieties. The grafting effects of different
interstock clones and different scion clones on the sur-
vival rate of grafted scions, diameter of living scions,
length of living scions, and the amount of male and
female strobili were investigated. The results showed
that the clone B118 had the highest graft affinity with
the clones of B2, B6, C4, C5, H10 and H17. It is found
that interstock clones can affect growth of diameter and
length of the living scions,and clone A05 had the larg-
est growth. There was different flowering among all the
living scions 18.07% of them produced female inflores-
cences, 6.02% of them produced male inflorescences,
and the average numbers of female and male inflores-
cences were 0.67 and 1.37, respectively. Of the 17 tested
scion clones, the living scions of seven clones produced
a total of 56 female and 114 male inflorescences. The ef-
fect of encouraging flowering on the live scions was dif-
ferent among the three interstock clones, and the clone
B118 had the best effect on promoting flowering. |
| Key words: Pinus caribaea · top grafting · promote
flowering |
