Registration of Tx732 Maize Germplasm Line

Betrán, F. J.; Bockholt, A. J.; Fojt, F.; Mayfield, Kerry

doi:10.2135/cropsci2004.1028a

Cited by 2 publications

(2 citation statements)

References 2 publications

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“…Seven of the lines, including Ark536, B73, B104, CML325 and NC280, were developed by public programmes outside of Texas. Six of the Texas AgriLife lines have been released (Betrán et al. 2004a–c, Llorente et al.…”

Section: Methodsmentioning

confidence: 99%

Genetic Variation for Maize Epicuticular Wax Response to Drought Stress at Flowering

Meeks

Murray

Hague

et al. 2011

J Agronomy Crop Science

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Drought stress is thought to promote epicuticular wax accumulation on maize leaves, which reduces plant water loss. We evaluated 62 maize inbred lines and their hybrid testcross progeny for epicuticular wax accumulation on flag leaves at flowering under full and limited irrigation regimes. Extracted wax was measured as a percentage of wax weight to leaf weight (WLW) and leaf area (WLA). Eleven genotypes had above average WLW as both inbred lines and hybrid testcrosses. Thirteen genotypes had above average WLA as either inbred lines or hybrid testcrosses. The drought treatment did not significantly alter WLW or WLA. Heritability of WLW was 0.17 (inbred lines) and 0.58 (hybrid testcrosses). Heritability of WLA was 0.41 (inbred lines) and 0.59 (hybrid testcrosses), suggesting it is a better trait than WLW for epicuticular wax screening. Correlations (r) between inbred lines and their testcross progeny were 0.44 and 0.18, for WLW and WLA, respectively. Heritability of grain weight per ear and plot yield was highest in hybrid testcrosses, with no correlation between inbred and hybrid germplasm. It is not warranted to evaluate epicuticular wax accumulation as the sole drought tolerance mechanism. However, it may be a good secondary trait to observe in relation to grain yield production in hybrids tested under water‐limiting conditions.

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Section: Methodsmentioning

confidence: 99%

Genetic Variation for Maize Epicuticular Wax Response to Drought Stress at Flowering

Meeks

Murray

Hague

et al. 2011

J Agronomy Crop Science

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“…Plant breeders at Texas AgriLife Research stations in College Station and Lubbock, TX developed 55 of the inbred lines from diverse germplasm sources. Six of the Texas AgriLife lines have been released [26][27][28][29][30] with the rest being "elite" inbreds from other programs, only some of which have been formally released [30,31]. Overall, germplasm consisted of a wide array of grain colors and genetic backgrounds, including yellow, white, red and blue grain types derived from tropical, Argentine and temperate origins.…”

Section: Germplasmmentioning

confidence: 99%

Measuring Maize Seedling Drought Response in Search of Tolerant Germplasm

Meeks¹,

Murray²,

Hague³

et al. 2013

Agronomy

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Abstract:To identify and develop drought tolerant maize (Zea mays L.), high-throughput and cost-effective screening methods are needed. In dicot crops, measuring survival and recovery of seedlings has been successful in predicting drought tolerance but has not been reported in C4 grasses such as maize. Seedlings of sixty-two diverse maize inbred lines and their hybrid testcross progeny were evaluated for germination, survival and recovery after a series of drought cycles. Genotypic differences among inbred lines and hybrid testcrosses were best explained approximately 13 and 18 days after planting, respectively. Genotypic effects were significant and explained over 6% of experimental variance. Specifically three inbred lines had significant survival, and 14 hybrids had significant recovery. However, no significant correlation was observed between hybrids and inbreds (R 2 = 0.03), indicating seedling stress response is more useful as a secondary screening parameter in hybrids than in inbred lines per se. Field yield data under full and limited irrigation indicated that seedling drought mechanisms were independent of drought responses at flowering in this study.

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Registration of Tx732 Maize Germplasm Line

Cited by 2 publications

References 2 publications

Genetic Variation for Maize Epicuticular Wax Response to Drought Stress at Flowering

Genetic Variation for Maize Epicuticular Wax Response to Drought Stress at Flowering

Measuring Maize Seedling Drought Response in Search of Tolerant Germplasm

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