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<p>To sustain in this era of global warming, rice breeders are trying to make varieties that have stable yields, high yield potential, and the ability to grow in a wide range of climates. It is well-known that diverse morphological characteristics responsible for yield enhancement in rice. Consequently, comprehending the morphological characteristics that contribute to yield enhancement is crucial for prioritizing rice varietal development research. Therefore, the present study aimed to identify genetic variations and high-yielding rice cultivars grown in Bangladesh. To that end, we conducted a two-year field experiment using 42 high yielding <i>aman</i> rice varieties, based on morphological features and multivariate analysis. The results revealed that the cumulative variances of PC1 and PC2 explained about 78.19% of the total variation in the studied cultivars in 2019 and 76.13% in 2020. According to the principal component scores (PC1 and PC2), BRRI hybrid dhan4, BRRI hybrid dhan6, and BRRI dhan87 were the highest contributors to grain yield in both the 2019 and 2020 growing seasons. Grain yield was significantly and positively correlated with the number of tillers hill<sup>− 1</sup>, number of panicles hill<sup>− 1</sup> and panicle length. Based on the genetic distance, the 42 rice cultivars were categorized into seven clusters. Among seven clusters, the more stable and site-specific high yielding rice cultivars (BRRI hybrid dhan4, BRRI hybrid dhan6, BRRI dhan75 and BRRI dhan87) were found in Cluster-3. There is a high level of genetic diversity investigated in the studied rice cultivars that could be leveraged in future rice breeding programs for varietal improvement.</p>

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Multivariate analysis for identifying high-yielding rice cultivars based on seed yield and morphological traits

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年8月24日

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  • Md. Asadulla Al Galib,
  • Sumaiya Farzana,
  • Tusher Chakrobarty,
  • Mohammad Zahidul Islam,
  • Bir Jahangir Shirazy,
  • Md. Akhlasur Rahman,
  • Shahin Imran,
  • Md. Tahjib-Ul-Arif,
  • Mohammad Saidur Rhaman

摘要

To sustain in this era of global warming, rice breeders are trying to make varieties that have stable yields, high yield potential, and the ability to grow in a wide range of climates. It is well-known that diverse morphological characteristics responsible for yield enhancement in rice. Consequently, comprehending the morphological characteristics that contribute to yield enhancement is crucial for prioritizing rice varietal development research. Therefore, the present study aimed to identify genetic variations and high-yielding rice cultivars grown in Bangladesh. To that end, we conducted a two-year field experiment using 42 high yielding aman rice varieties, based on morphological features and multivariate analysis. The results revealed that the cumulative variances of PC1 and PC2 explained about 78.19% of the total variation in the studied cultivars in 2019 and 76.13% in 2020. According to the principal component scores (PC1 and PC2), BRRI hybrid dhan4, BRRI hybrid dhan6, and BRRI dhan87 were the highest contributors to grain yield in both the 2019 and 2020 growing seasons. Grain yield was significantly and positively correlated with the number of tillers hill− 1, number of panicles hill− 1 and panicle length. Based on the genetic distance, the 42 rice cultivars were categorized into seven clusters. Among seven clusters, the more stable and site-specific high yielding rice cultivars (BRRI hybrid dhan4, BRRI hybrid dhan6, BRRI dhan75 and BRRI dhan87) were found in Cluster-3. There is a high level of genetic diversity investigated in the studied rice cultivars that could be leveraged in future rice breeding programs for varietal improvement.