| Autor: |
Babar, Allah Ditta, Maqsood, Umer, Zaka, Abha, Oreiro, Eula Gems, Vera Cruz, Casiana M., Arif, Muhammad |
| Předmět: |
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| Zdroj: |
Pakistan Journal of Agricultural Sciences; 2022, Vol. 59 Issue 5, p765-773, 9p |
| Abstrakt: |
Premium quality Super Basmati (SB) is world famous rice for its aroma and excellent cooking quality, but is highly susceptible to bacterial leaf blight (BLB), caused by Xanthomonas oryzae pv. oryzae (Xoo). The present study focuses on molecular and genetic characterization of 172 Basmati derived backcross inbred lines (BILs) for BLB resistance using IRBB57 as resistance donor genes and SB as recurrent parent. Foreground survey results showed presence of single and different combination of three BLB resistance genes i.e., Xa4, xa5, and Xa21 in different lines. Evaluation of six Xoo races used in present study showed that combination of Xa4+xa5+Xa21 present in 21 BILs, is more effective as compared to introgression of single gene or combination of any two genes. Most frequent combination of Xa4+Xa21 was recorded in 58.72% of the studied population. The BILs showed complete to moderate resistance against four Xoo races, however two Xoo races PXO341 and PXO99 were observed to be the most virulent for the tested BILs population. In present study, BIL 25 (carrying Xa4+xa5+Xa21) showed minimum lesion length 0.67 cm against PXO61 whereas BIL148 and BIL 236 (with single gene Xa4) were displaying lesion length 24.87 cm and 23.67 respectively against PXO99 and PXO341. Background genome scanned using Cornell 7K Array Infinium Rice, results showed genome recovery ranging from 73.5% (BIL13) to 93.8% (BIL46), whereas most of the population was carrying > 90% Basmati genome. Agronomic study of 172 BILs population, grown at three different locations in rice growing areas showed presence of Basmati like traits and higher yield along with bacterial blight resistance showing successful introgression of BLB resistant genes in Basmati rice. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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