BREEDING FOR IMPROVING SOME EXOTIC CHICKPEA GENOTYPS UNDER STRESS CONDITIONS. 1-STABILITY ANDSELECTION FOR YIELD AND DROUGHT SUSCEPTAPILITY INDEX.

Sixty-four chickpea genotypes introduced from ICARDA were evaluated with
the commercial cultivars Giza-1 for yield and some components (water regime and
rainfall) during two growing seasons (2002/03and 2003104) at Maryout and and
2003/2004 seasons EI-Maghara Research Stations, Desert Research Center.
Seed yield and some components were subjected to phenotypic stability
analysis according to the procedure proposed by Eberhart and Russell (1966). The
results indicated that a wide range of variability betw_een two locations and high
genotypic differences were detected. The genotype x environment interaction was
significant and a major portion of this was accounted by the deviation from linear
response. Seed yield and some components influenced by the two supplemental
irrigations. The highest values of these traits were obtained when chickpea plants
were irrigated for two times. This out yielded for seed yield per plant by 436.19 and
134.18% at Env.2 and Env.1 (only one irrigation at sowing with seasonal rainfed) and
55.02 and 151.59% at EnvA and Env.5 (under intervals drip irrigation).
Genotypes no. 1,2,5,10,15,29,30,39,Giza-1 and 44 gave the highest values for
all traits, whereas genotypes no.20, 12,11 and 14 as well as genotypes no.11,
5,3,4,36,43,42,33 and 34 recorded the highest values for DSl1 and DSI2 respectively.
Also, genotypes no.1, 5,8,23,36 and 46 were more stable for seed yield and some
components compared with the other genotypes and the commercial.
Finally, genotypes no.5 and 1 are consider the best genotypes because they
more stable and highly drought tolerant.