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EVALUATION OF DROUGHT TOLERANCE INDICES AND YIELD STABILITY OF WHEAT CULTIVARS TO DROUGHT STRESS

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Пахтачилик ва дончилик илмий-амалий журнал

Пахтачилик ва дончилик илмий-амалий журнал

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ARTICLE ANNOTATION

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The article presents the results of phenotyping according to the criteria of the drought resistance index of bread wheat varieties of Central Asia and Kazakhstan. Phenotyping is a field of science focused on the quantitative measurement of morphological and functional properties. The evaluation of grain yield indicators of the studied varieties grown on two backgrounds - optimal irrigation and simulated drought conditions - was carried out according to stress resistance indices (STI), grain yield stability (YSI). The hydrothermal coefficients for 2020 and 2021 were 1.67 and 0.64 in April, and 0.62 and 0.15 in May, respectively, indicating an acute moisture deficit for wheat during the 2021 growing season. Stress tolerance TOL = (Yp - Ys) is the difference between the yield of grain obtained under optimal conditions and under drought: the greater the difference, the lower the stress tolerance. Among the varieties released in Uzbekistan according to these characteristics, the varieties Asr, Durdona, Mars 1, Tezpishar, Turkiston, Khosildor, Yaksart, Yonbosh had high rates, in which the difference in yield from 1 m2 was more than 200 g, and in the varieties Andijon 1, Bobur , Omad, E’zoz, Qairoktosh and Sanzar 6, this figure was less than 100 g. According to the stability index, the varieties Andijon 1, Andijon 4, Bobur, E’zoz and Sanzar 6 showed a high result, which indicates that these varieties can provide an average yield with moisture deficiency.

AUTHORS

S.Babaev

Ўзбекистон Республикаси Фанлар Академияси Генетика ва ўсимликлар экспериментал биологияси институти.

D.Qulmamatova

Ўзбекистон Республикаси Фанлар Академияси Генетика ва ўсимликлар экспериментал биологияси институти.

S.Baboeva

Ўзбекистон Республикаси Фанлар Академияси Генетика ва ўсимликлар экспериментал биологияси институти.

SH.Adilova

Ўзбекистон Республикаси Фанлар Академияси Генетика ва ўсимликлар экспериментал биологияси институти.

D.Takhirboeva

Ўзбекистон Республикаси Фанлар Академияси Генетика ва ўсимликлар экспериментал биологияси институти.

Tags

# stability# стабильность# юмшоқ буғдой# мягкая пшеница# генотип# genotype# барқарорлик# productivity# ҳосилдорлик# урожайность# varieties# засуха# навлар# сорта# қурғоқчилик# bread wheat# drought# стрессга чидамлилик индекси# ге- нотип# фенотиплаш.# индекс стрессоустойчивости# фенотипирование# stress resistance index# phenotyping.

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Article Identifiers

ROI:

https://eroi.uz/11.0108/A0622-0012

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