NAMES, PEDIGREES, ORIGINS, AND ADAPTATION - IBSA

of the crosses, both of Indian and foreign origin, have yielded cultivars whichare not only adapted to Indian conditions but also show wide adaptability acrosscountries (Table 9).Various terms have been used in the literature to describe the height ofshort-strawed wheats: single (one-gene), double gene (two-gene), triple gene(three-gene), single dwarf, double dwarf, and triple dwarf. In this compilation,however, the terms "one- gene dwarf" and "two-gene dwarf" have been usedto describe semi-dwarfand dwarfwheats respectively. As all the short-strawedwheat cultivars referred to carry the Norin 10 dwarfing genes Rhtl and/or Rht2,semidwarf height in bread wheat is characterized by either Rhtl or Rht2 andin durum wheats by Rht1. Dwarf height of bread wheats, on the other hand, isdue to the presence ofboth Rhtl and, Rht2. In recent years, dwarfing genes havebeen identified in several wheat cultivars (Nelson, Dubin, and Rajaram, 1980;Gale, Marshall, and Rao, 1981; Singh et at., 1989; and Jain, unpublished) andinformation on the same,wherever available, has been incorporated.Foreign wheat cultivars and elite germplasm that have proved successful eitheras direct introductions or as breeding parents in Indian wheat programme aregiven in Tables 6, 8, and 11. Similar information on Indian land races, elitegermplasm and finished products that have proved successful in foreign countriesis provided in Tables 7 and 12. This information is based on Macindoe andBrown (1968), Dalrymple (1978,1986), Zeven and Zeven-Hissink(l976), Villarealet at. (1985), Zeven and Reiner (1991), AICWIP and CIMMYT records. Manymore such cultivars, however, may have remained unnoticed. Indian germplasmthat has been successfully used in developing Indian wheats is listed inTable 10.Pedigrees of the cultivars, in various tables, are presented following the formadopted by CIMMYT. The name of breeding parent in the cross, as far aspossible, refers to cultivar name or its synonym. Code/number of advanced linehas been used only for widely documented international lines, and otherbreeding lines whose pedigree was either not available or was very long.Cultivars whose original pedigrees have either been modified or expanded aregiven in Table 13. For some cultivars and lines, more than one pedigree isreported in the literature. In a majority of such cases, the pedigree given inthe official list of cultivars has been retained. In a few cases, the one thatappeared correct on the basis ofliterature and other information has been used.Alternative versions of-such pedigrees, however, are presented in Table 14.The abbreviations used for cultivars and lines are the ones given in WheatCultivarAbbreviations (Skovmand, 1994). Wheats for which abbreviations hadnot yet been assigned were given abbreviations following the receBt nomenclatureand the procedure developed at CIMMYT. Since pedigrees ofmany foreignwheats are not easily accessible, the abbreviations used for various cultivarsand lines have been explained in Tables 15 and 16 so that researchers can trace3