THE SEARCH FOR SOURCES OF DROUGHT RESISTANCE AMONG A NEW COLLECTION OF SOYBEAN (GLYCINE MAX) IN CONDITIONS OF SOUTH- EASTERN KAZAKHSTAN
2019
Erzhebaiyeva, R.S. | Didorenko, S.V. | Kudaybergenov, M.S. | Daniyarova, A.K. | Amangeldiyeva, A.A.
In the South-East of the Republic of Kazakhstan 98 soybean collection samples (Glycine max L.) of domestic and foreign varieties from 20 countries were tested: Russia, Ukraine, Georgia, Belarus, Tajikistan, Latvia, Hungary, Poland, Moldova, Romania, China, Japan, France, Canada, Switzerland, Sweden, Cuba, North Korea, Vietnam and Taiwan. Soybean collection were tested on two contrasting backgrounds to find new drought resistant sources: in the irrigated and rainfed land conditions. 80% of soybean collection was tested in Kazakhstan for the first time. Traits such as length of the vegetation period, plant height, yield, morphology and leaf pubescence, INDV were studied. Various methods related to calculation of soybean drought resistance indexes were developed. Based on the assessment of vegetation period, soybean collection samples were divided into 6 maturity groups: 00, 0, I, II, III, IV. It was found that 24 samples, belong to the IV maturity group, have a vegetation period of above 160-170 days do not fully ripen in the South-East of Kazakhstan. Different indexes (STI, K1SYI, K2SYI) used by researchers to assess drought resistance have relatively similar values and can be used to assess drought resistance of soybean varieties. The direct genotypic correlation of seed yield and drought resistance index (STI) of the tested samples for different maturity groups and contrast backgrounds of irrigation ranged from0.642-0.947 on both irrigated and rainfed land. 17 samples with high drought resistance index (0.83-4.8) were identified from the collection. The majority of samples with high indexes of drought resistance belong to the II maturity group. The sources of drought resistance with high indicators on three-four trait, Sponsor, DV-254, Y-48, Pripyat, Vilana, Xinjiang D11-252, were identified.
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