Investigation of Sexual Intergeneric Hybrid Progenies between Citrus Cultivar and Citropsis schweinfurthii
Citropsis schweinfurthii (Engl.)Swing. & M. Kell. species, native to Africa, are considered to be surviving remote ancestors of Citrus. In a previous study, we reported the first-time production through an embryo culture of sexual intergeneric hybrids between the Citrus cultivar Nanpu tangor and C. schweinfurthii. CMA chromosome banding for both parents and progenies was conducted to obtain cytogenetic information. The karyotype composition of C. schweinfurthii was very simple (14D + 4E) , while that of Nanpu tangor had other, additional chromosome types (1A + 4C + 5D + 8E). Two progenies with C. schweinfurthii as the maternal parent showed 1A + 1C + 11D +5E both, suggesting that each one of the type A and C chromosomes were inherited from Nanpu tangor. Thus, hybridism was proven at the chromosome level. However, the growth of these progenies showed serious weaknesses under greenhouse conditions. Interestingly, the vigor of the progenies with Nanpu tangor as the maternal parent was obviously less than those with C. schweinfurthii as the maternal parent. This phenomenon might result from the interaction between the nucleus and cytoplasm. When these intergeneric hybrid progenies were grafted onto C. schweinfurthii, they showed vigorous growth.
Ancestral species ChromomicinA3 (CMA) karyotype Cross incompatibility Scanning electron microscope ( SEM)
K. Yasuda H. Kunitake M. Yahata R. Matsumoto
The Interdisciplinary Graduate School of Agriculture and Engineering, University of Miyazaki, 1-1,Ga The Interdisciplinary Graduate School of Agriculture and Engineering, University of Miyazaki, 1-1,Ga The Faculty of Agriculture, Shizuoka University, 836 Ohya, Suruga, Shizuoka 422-8529, Japan The Faculty of Agriculture, Saga University, Honjyomachi, Saga-shi, Saga 840-8502, Japan
国际会议
11th International Citrus Congress(第11届国际柑橘大会)
武汉
英文
121-125
2008-10-01（万方平台首次上网日期，不代表论文的发表时间）