(go to KOMUGI Home) (go to WIS List) (go to NO.78 Contents)

---

Results and discussion

As the landraces were tested separately in 1991-1992, the crossability percentage of Chinese Spring in the year was applied in the t-test.

1. The crossabilities of wheat landraces from Hunan Province: The crossability percentages with rye of 44 wheat landraces from Hunan Province, China were investigated in 1991 (Table 1). The crossability percentages of Chinese Spring with rye in 1991 (73.0%) was used for comparison with those of landraces.

Of the 44 landraces involved in this investigation, seven showed much higher crossabilities than Chinese Spring, 14 had similar crossabilities to Chinese Spring, and 23 presented lower or no crossabilities with rye. The landraces with much higher crossabilities than or similar to Chinese Spring frequently occurred in the central and southern parts of the Province (Fig. 1).

2. The crossabilities of wheat landraces from Hubei Province: The crossability percentages with rye of 50 wheat landraces from Hubei Province, China were investigated in 1992 (Table 2). The crossability percentages of Chinese Spring with rye in 1992 (77.0%) was used for comparison with those of landraces.

Among 50 landraces from Hubei Province, four accessions showed much higher crossability than the Chinese Spring, seven had similar crossability to Chinese Spring and 39 presented lower or no crossabilities with rye. The landraces with much higher crossabilities than and similar to Chinese Spring were widely distributed in the Hubei Province, China (Fig. 2).

From the investigation, it is clear that the distribution of high crossability landraces in Hunan and Hubei provinces is geographically continuous with that in Sichuan, Shaanxi and Henan Provinces, China (Luo et al. 1992, 1993a).


Acknowledgments

The authors are highly thankful to the National Science Foundation of China and IBPGR, FAO, UN, for their financial supports. The helps of Mr. S. Q. Yun and Mr. Q. C. Zhang in providing landraces samples, and Ms K. H. Peng, Mr. S. H. Han, Mr. B. Shuai and Ms. Z. Jiang in emasculation work are gratefully acknowledged.


References

Luo MC, Yen C and Yang JL (1992) Crossability percentages of bread wheat landraces from Sichuan Province, China with rye. Euphytica 61: 1-7.

Luo MC, Yen C and Yang JL (1993a) Crossability percentages of bread wheat landraces from Shaanxi and Provinces, China with rye. Euphytica 67: 1-8.

Luo MC, Yen C and Yang JL (1993b) Crossability percentages of bread wheat collections from Tibet, China with rye. Euphytica 70: 127-129.

<--Back

(go to KOMUGI Home) (go to WIS List) (go to NO.78 Contents)