The use of introgressive hybrids in the selection of kochia prostrata (l.) schrad | [Pakistan Journal of Botany • 2024]

Author(s):

1. NURGUL MELDEBEKOVA: Department of Pasture Resources Management, Kazakh Scientific Research Institute of Livestock and Fodder Production,050043, 51 Zhandosov Str., Almaty,Republic of Kazakhstan

2. GALYMZHAN KENZHEGALIEV: Department of Feed Production, Kazakh Scientific Research Institute of Livestock and Fodder Production,050043, 51 Zhandosov Str., Almaty,Republic of Kazakhstan

3. KANYSH KUSHENOV: Department of Feed Production, Kazakh Scientific Research Institute of Livestock and Fodder Production, 050043, 51 Zhandosov Str., Almaty, Republic of Kazakhstan

4. KANAT SHANBAYEV: Department of Pasture Resources Management, Kazakh Scientific Research Institute of Livestock and Fodder Production,050043, 51 Zhandosov Str., Almaty,Republic of Kazakhstan

5. ELMIRA KANTARBAEVA: Department of Agronomy and Forestry, M. Kozybayev North Kazakhstan University, 150000, 86 Pushkin Str., Petropavlovsk, Republic of Kazakhstan

Abstract:

In the territory of Kazakhstan, introgressive hybridisation is documented in many species of forage plants of the North Turan. Regarding Kochia prostrata, the facts of introgression at the subspecies level become known, therefore, it indicates the existence of spontaneous hybrids. It showed the morphological similarity of the so-called "rocky ecotypes" with natural hybrid populations. In the second stage (2000-2005), more in-depth studies based on the theory of introgressive hybridisation clarified the origin of rocky ecotypes as a result of the evolutionary incompleteness of the subspecies stage. Subsequently, the analysis of the species area of K. prostrata, conducted by the authors based on the results of expeditionary studies, allowed identifying 5 foci (microcentres) of localisation of introgressive hybrids in the territory of Kazakhstan and Central Asia. The applied use of these natural hybrids served as a theoretical justification for the deployment of large-scale selection work. Based on the results of many years of research (2005-2015), the authors have successfully developed the main methods of the selection of K. prostrata. The creation of hay-type varieties using rocky (introgressive) populations was a new area in selection practice. This study presents the materials of the completed process of selection from collection nurseries to the final stage of the State Testing of the Isken variety, covering a period of more than 15 years.

Page(s): 1021-1027

DOI: 10.30848/PJB2024-3(35)

Published: Journal: Pakistan Journal of Botany, Volume: 56, Issue: 3, Year: 2024

Keywords:

Selection , Area , Haying variety , Variety testing , Introgression , Intergradation zones , Natural hybrids

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