C. Report of the Committee on Genetic Stocks

N. IWATA, Convener

We present a report from Rice Genetic Stock Center at IRRI: Wild relatives of rice conserved at the International Rice Germplasm Center (by D. A. Vaughan et al.). In Rice Genetic Stock Center at Kyushu University, we did not receive any seed sample and information during last one year.

We will compile and present the list of marker gene stocks and an additional genetic stocks in future issues of RGN. We request kind cooperation of all RGC members concerned.

We also request all RGC members to contribute a share of seeds of new genetic stocks, particularly of those reported in RGN, to Rice Genetic Stock Center, either the convener's laboratory at Kyushu University or at IRRI. If received, we present a list of receipts in this report.

Wild relatives of rice conserved at the International Rice Germplasm Center, IRRI

Duncan A. VAUGHAN, Ma. Socorro ALMAZAN, Myrna OLIVA and Ma. Elizabeth NAREDO

International Rice Germplasm Center, IRRI, P. O. Box 933, Manila, Philippines

The current inventory of the wild relatives of rice in the International Rice Germplasm Center (IRGC) is presented. This inventory accounts for the total number of accessions conserved in IRGC, excluding 42 accessions known to be duplicates. Incoming samples currently under quarantine inspection and for which seed stocks are, as yet, insufficient for assigning an accession number are also presented (Tables 1 and 2).

The nomenclature follows that used by Chang (1988) and Vaughan (1989). Hybrid populations were identified by the collector, donor or as a result of characteristics observed when the material was grown and recharacterised.

All known Oryza species are now present in the collection conserved in IRGC. There are a number of countries where wild relatives of rice are known to occur, or have occurred, from which no population is conserved in IRGC. These countries include Bolivia, Ecuador, Peru and Trinidad and Tobago in Latin America, Angola, the Central African Republic, Namibia and Mozambique in Africa and Pakistan in Asia. The overall representation of populations of wild rice in different geographic regions is as follows:


     Latin America                      -3.7% of samples from 14 countries
     Africa                                  -16.6% of samples from 24 countries
     Asia                                     -72.8% of samples from 15 countries
     Australia and Papua New Guinea  -6.9% of samples

Of the 11 genera related to Oryza in the subfamily Oryzoideae, only Malte- brunia and Zizania are not represented in the IRGC collection. Zizania is deliberately excluded from the Philippines for quarantine reasons. The species represented from related genera and their origin is presented (Table 3).

Reference

Chang, T. T., 1988. Taxonomic key for identifying the 22 species in the genus Oryza. Int. Rice Res. Newslett. 13(5): 4-5.

Vaughan, D. A., 1989. The genus Oryza L.: current status of taxonomy. IRRI Res. Paper Ser. no. 138. IRRI, Los Banos, Laguna, Philippines. 21pp.

Table 1. Oryza species and the number of accessions conserved in the
International Rice Germplasm Center, IRRI (August, 1991).
====================================================================
    Species                          Number of accessions
                                     (incoming samples)
====================================================================
O. alta                              10
O. australiensis                     25
O. barthii                           147 (13)
O. brachyantha                       11
O. eichingeri                        18
O. giumaepatula                      32
O. grandiglumis                      8
O. granulata                         7(10)
O. indandamanica                     I
O. latifolia                         33
O. longiglumis                       5 (1)
O. longistaminata                    108 (64)
O. malampuzhaensis                   5
O. meridionalis                      39
O. meyeriana                         7 (4)
O. minuta                            47 (18)
O. nivara                            318 (43)
O. officinalis                       155 (72)
O. punctata                          41 (6)
O. rhizomatis                        18
O. ridleyi                           11 (7)
O. rufipogon                         494 (218)
O. schlechteri                       (1)
O. spontanea and hybrid populations  309  (31)
Oryza species                        38
===================================================================
   Total                             1,887 (488)
===================================================================


Table 2.  Accessions of Oryza species conserved in the IRGC, IRRI arranged by
country of origin and species (August. 1991).
===================================================================
Origin                 Species         Number of accessions
                                         (incoming samples)
===================================================================
Africa             O. barthi                              3
                   O. longistaminata                     5
Argentina          O. latifolia                          1
Australia          O. australietisis                    23
                   O. nieridionalis                     39
                   O. rufipogon                          1
Bangladesh         O. nivara                            21
                   O. officinalis                        1
                   O. rufipogon                         24(4)
                   O. spontanea and hybrid population    28(2)
                   Oryza species                          1
Benin              O. longistamitiata                     2
Botswana           O. barthii                             1
                   O. longistaminata                      1
Brazil             O. alta                                2
                   O. gluniaepatlila                     20
                   O. grandigluinis                       8
Brunei             O. officinalis                        13
Burkina Faso       O. barthii                             3
Cnmbodia           O. nivara                             41(22)
                   O. rufipogon                           5(17)
                   O. spontanea and hybrid populations    4(2)
Cameroon           O. barthii                            21
                   O. brachyantha                         3
                   O. longistaminata                     13(5)
                   O. plinctata                           8
Chad               O. barthii                            22(11)
                   O. brachyantha                         1
                   O. longistaminata                      5(2)
                   O. punctata                            3(2)
China              O. granulata                           1
                   O. nivara                              2
                   O. officinalis                        10(2)
                   O. rufipogon                           9
                   O. spontanea and hybrid populations   33
China-Taiwan       O. nivara                              3
                   O. rufipogon                          36
                   Hybrid populations                    41
Colombia           O. glumaepatula                        1
                   O. latifolia                           2
Costa Rica         O. latifolia                           7
Cuba               O. glumaepatula                        3
                   O. latifolia                           1
Ethiopia           O. longistamitiata                    10
French Guiana      O. glumaepatula                        1
Gambia             O. barthii                             6
Ghana              O. longistaminata                      2
                   O. punctata                            1
Guatemala          O. latifolia                           8
Guinea             O. barthii                             6
                   O. brachyantha                         1
Guinea-Bissau      O. longistaminata                      1
Guyana             O. alta                                1
                   O. glumaepatula                        1
India              O. granulata                           2(4)
                   O. indandamanica                       1
                   O. malampuzhaensis                     4
                   O. nivara                            104
                   O. officinalis                         9
                   O. rufipogon                          97(19)
                   O. spontanea and hybrid populations   82(2)
                   Oryza species                          2
Indonesia          O. longiglumis                         5
                   O. meveriana                            (1)
                   O. officinalis                        49(19)
                   O. ridleyi                             2
                   O. rufipogon                          10(14)
                   O. spontanea                           2
                   Oryza species                          1
Ivory Coast        O. barthii                             1
                   O. longistaminata                      8
Kenya              O. longistaminata                      4
                   O. punctata                            4
Laos               O. granulata                            (2)
                   O. nivara                              5
                   O. rufipogon                          15(5)
                   O. spontanea                           1
Madagascar         O. longistaminata                      2
                   O. punctata                             (1)
                   Hybrid populations                     2
Malaysia           O. meyeriana                           6(1)
                   O. officinalis                        26(3)
                   O. ridleyi                             4(2)
                   O. rufipogon                           5(4)
                   Hybrid populations                     5
Mali               O. barthii                            52(1)
                   O. brachyantha                         1
                   O. longistaminata                     12(57)
                   Oryza species                          1(2)
                   Hybrid populations                     2
Mauritania         O. barthii                              (1)
Mexico             O. latifolia                           3
Myanmar            O. granulata                           1
                   O. nivara                              3(18)
                   O. officinalis                         3(26)
                   O. rufipogon                           6(36)
                   O. spontanea and hybrid populations    5(17)
Nepal              O. granulata                           1(2)
                   O. nivara                              9
                   O. rufipogon                           3
                   O. spontanea                           1
Nicaragua          O. latifolia                           1
Niger              O. barthii                             3
                   Hybrid populotions                     2
                   Oryza species                          1
Nigeria            O. barthii                             4
                   O. longistaminata                     14
                   O. punctata                            5(3)
                   Oryza species                          1
Panama             O. latifolia                           1
Papua New Guinea   O. longiglumis                          (1)
                   O. minuta                               (4)
                   O. officinalis                          (6)
                   O. ridleyi                              (3)
                   O. rufipogon                            (54)
                   O. schlechter!                          (1)
Paraguay           O. latifolia                           1
Philippines        O. meyeriana                            (2)
                   O. minuta                             43(14)
                   O. officinalis                        29(9)
                   O. rufipogon                           3
Senegal            O. barthii                             8
                   O. longistaminata                      7
                   Hybrid populations                     2
Sierra Leone       O. barthii                             3
                   O. brachyantha                         5
                   O. longistaminata                      3
Sri-Lanka          O. eichingeri                          8
                   O. granulata                           1
                   O. nivara                             29
                   O. officinalis                         2
                   O. rhizomatis                         18
                   O. rufipogon                          18
                   Hybrid populotions                    17
Sudan              O. barthii                             7
                   O. longistaminata                      1
Surinam            O. alta                                4
                   O. glumaepatula                        2
                   O. latifolia                           1
Tanzania           O. barthii                             4
                   O. longistaminata                     11
                   O. punctata                           11
Thailand           O. granulata                           1
                   O. nivara                            100(3)
                   O. officinaiis                         7(5)
                   O. ridleyi                             5(2)
                   O. rufipogon                         250(8)
                   O. spontanea ond hybrid populations   73(4)
                   Oryza species                         30
Uganda             O. eichingeri                         10
Venezuela          O. glumaepatula                        3
Vietnam            O. granulata                            (2)
                   O. officinalis                         2(2)
                   O. rufipogon                           7(57)
                   O. spontanea                           1(3)
Zaire              O. longistaminata                      1
                   O. punctata                            1
Zambia             O. barthii                             1
                   O. longistaminata                      5
Unknown            O. alta                                3
                   O. australiensis                       2
                   O. barthii                             2
                   O. glumaepatula                        1    
                   O. granulata                           1
                   O. latifolia                           8
                   O. longistaminata                      1
                   O. malampuzhaensis                     1
                   O. minuta                              4
                   O. nivara                              1
                   O. officinalis                         4
                   O. punctata                            7
                   O. rufipogon                           6
                   O. spontanea ond hybrid populations    4
                   Oryza species                          1
======================================================================
                                                 1,887 (488)
======================================================================


Table 3. Species in genera related to Oryza conserved in IRGC and their
origin (August, 1991)
======================================================================
     Species                    Origin        Total number of accession
                                              (incoming samples)
======================================================================
Chikusichloa aquatica           Japan                              (1)
Hygroryza aristata              Sri  Lanka                        4
Leersia hexandra                Philippines                       1(1)  
Leersia perrieri                Madagascar                        1
Leersia tisseranti              Cameroon                          1
                                Guinea                            1
Luziola leiocarpa               Argentina                          (1)
Porteresia coarctata            Bangladesh                        1
Potamophila parviflora          Australia                         1
Prosphytochloa prehensilis      South Africa                       (1)
Rhynchoryza subulata            Argentina                         1
Zizaniopsis villaensis          Argentina                          (1)
======================================================================
Total                                                            10(6)
======================================================================