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<p>In the present study, 238 wheat lines were evaluated for assessing the genetic diversity for 19 different traits. The genetic diversity analysis grouped the total lines into nine clusters indicating the presence of wide genetic diversity. The cluster III has maximum number (77) while cluster II (14) and V (14) have minimum number of lines under timely sown conditions. Similarly, cluster IV had maximum (42) and cluster V had minimum number (17) of wheat lines. The maximum inter cluster distance was observed between cluster V and VII (8.10) under timely; and between II and IX (7.47) under late sown conditions. Under timely sown conditions, chlorophyll-a (22.08%), days to maturity (11.42%) contributed maximum and harvest index (0.52%), canopy temperature (0.49%) contributed minimum towards genetic divergence. Likewise, number of grains per spike (18.41%), seed density (17.71%) and biological yield per meter (0.17%) and number of spikelets per spike (0.16%) contributed maximum and minimum towards genetic divergence under late sown conditions. Further, seven (6, 22, 42, 52, 110, 161, 169) promising progenies identified from clusters II, V and IX under timely sown conditions and 5 progenies (43, 53, 67, 99, 151) from 3 diverse cluster II, V and VI under late sown conditions found to be superior for multiple traits. Out of these lines, the best line can be used directly as a variety after multi-location evaluation. Secondly, these lines can be used in hybridization program to obtain transgressive segregants.</p>

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Genetic diversity analysis for morpho-physiological traits in bread wheat (Triticum aestivum L.)

  • 期刊论文

  • 发表日期：

    2025年2月16日

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  • Satender Yadav,
  • Vikram Singh,
  • Hari Kesh,
  • Mukesh Kumar,
  • V. S. Mor,
  • Shikha Yashveer

摘要

In the present study, 238 wheat lines were evaluated for assessing the genetic diversity for 19 different traits. The genetic diversity analysis grouped the total lines into nine clusters indicating the presence of wide genetic diversity. The cluster III has maximum number (77) while cluster II (14) and V (14) have minimum number of lines under timely sown conditions. Similarly, cluster IV had maximum (42) and cluster V had minimum number (17) of wheat lines. The maximum inter cluster distance was observed between cluster V and VII (8.10) under timely; and between II and IX (7.47) under late sown conditions. Under timely sown conditions, chlorophyll-a (22.08%), days to maturity (11.42%) contributed maximum and harvest index (0.52%), canopy temperature (0.49%) contributed minimum towards genetic divergence. Likewise, number of grains per spike (18.41%), seed density (17.71%) and biological yield per meter (0.17%) and number of spikelets per spike (0.16%) contributed maximum and minimum towards genetic divergence under late sown conditions. Further, seven (6, 22, 42, 52, 110, 161, 169) promising progenies identified from clusters II, V and IX under timely sown conditions and 5 progenies (43, 53, 67, 99, 151) from 3 diverse cluster II, V and VI under late sown conditions found to be superior for multiple traits. Out of these lines, the best line can be used directly as a variety after multi-location evaluation. Secondly, these lines can be used in hybridization program to obtain transgressive segregants.