International Rice Research Institiute, P.O. Box 933, Manila, Philippines
The recessive mutant g of rice, which conditions long empty glumes
instead of rudimentary glumes of the grain, is a very useful marker of
linkage group IV. Many rice varieties in our germplasm bank have long empty
glumes. In search of new loci, conditioning long empty glumes, we studied
the allelic relationships of the genes for long glumes in these varieties
with the known g gene (RGS 10). A total of 49 varieties from 14 countries
(Table 1) were crossed with IR36 had rudimentary glumes and with RGS 10. All
the F\1\'s with IR36 had rudimentary glumes thus indicating that long empty
glumes in all of these varieties are under recessive gene control. The
F\1\'s of all of these varieties with RGS 10 had long empty glumes thereby
showing that the recessive genes conditioning long empty glumes in all these
varieties are allelic to g. Since these varieties come from many different
countries, they are unrelated to each other. Thus the different mutational
events must have occurred at the same locus as independent events. Our
search for a new locus conditioning long empty glumes was unfruitful.
Table 1. Varieties from the IRRI germplasm bank with long empty glumes
analyzed in this study
================================================== Acc. No. Variety Name Country of Origin ================================================== 1349 P.I. 160764-2 China 1358 P.I. 160769-1 China 1454 P.I. 160863-1 China 1535 Fei Oh Chan China 1537 Pien Chan Ying Tao China 1583 Chang Ch'sang Hsu Tao China 2809 Paiyautsuru 4 Taiwan 4000 Gungen-lang-shui-pe Philippines 4212 Boenar Indonesia 5999 Pankhari 203 India 6574 Pankiraj 258 Banglasesh 8268 Pappaku Taiwan 8519 DZ 180 Bangladesh 8739 UCP 38 Bangladesh 11875 Kh. Nganh Tamay Laos 15165 C Ivory Coast 15900 Ebagagona Senegal 17065 Napatsupai Taiwan 17909 Ketan Manggaran Indonesia 22422 ARC 12889 India 23240 Slab Cambodia 23267 Srau Slap Cambodia 23527 Khao Pick Deng Laos 24182 Ba Ponar Vietnam ================================================== ================================================== Acc. No. Variety Name Country of Origin ================================================== 25218 Luttu Indonesia 25599 Pulut Kalesa Indonesia 27038 Ase Pulu Haji Indonesia 27050 Ase Pulut Cambang Indonesia 28493 Tsao-fei-lai-feng China 30593 Payon Sierra Leone 30733 Jebowalogi (A2-102) Liberia 30740 Kartiwegee (A2-76) Liberia 30795 Maniqui (A2-95) Liberia 30809 Netemah (A2-98) Liberia 30864 Liberian Coll. D1-31 Liberia 31335 Liberian Coll. B-72 Liberia 31576 Fori Pakri Bangladesh 33757 Taungpyanyin Burma 33758 Taungpyanyin Burma 35091 Pakhai Raj India 38132 Pankhiraj 26-551 Bangladesh 41335 ARC 14035 India 42829 ARC 13994 India 43240 ARC 15858 India 46511 Pankhasail India 46512 Pankheraj India 47039 2-IS13-C77 Ivory Coast 50855 Kopike 1 (531) Ivory Coast 53392 Fei-lai-feng China ==================================================