Study on Curing Characteristics of ‘YY021’ and Its Heterosis

doi:10.11924/j.issn.1000-6850.casb2023-0393

Abstract

Abstract:

In order to study the curing characteristics and advantages of ‘YY021’, ‘YY021’ and its dam ‘MSY106’ and male parent ‘LY1306’ were used as test materials, and the yellowing and browning characteristics of the upper, middle and lower parts were studied by dark box test, and the water loss characteristics, chlorophyll degradation characteristics and polyphenol oxidase activity changes of the middle tobacco leaves were studied by electric oven test, and the hybrid advantages of easy curing and roast resistant of ‘YY021’ were evaluated. The results showed that the yellowing rate of the upper, middle and lower leaves was ‘YY021’>‘LY1306’>‘MSY106’, the browning rate of the lower and middle tobacco leaves was ‘LY1306’>‘MSY106’>‘YY021’, and the browning rate of the upper tobacco leaves was ‘LY1306’>‘YY021’>‘MSY106’. The yellowing index and browning index of ‘YY021’ and its parents decreased with the rise of leaf position. The balance of water loss in the middle tobacco leaves showed that ‘LY1306’ was significantly higher than ‘MSY106’, and ‘YY021’ was in the middle of the parents, which had the advantage of middle parenthood. The degradation rate of chlorophyll in the middle of ‘YY021’ was not significantly different from that of the parents, and there was no heterogeneous advantage. The average PPO activity of central leaves was ‘MSY106’>‘YY021’>‘LY1306’, with significant differences between varieties, and ‘YY021’ had the advantage of mesokinship. Based on the above indicators and production performance, the middle tobacco leaf of ‘YY021’ had medium easy curing potential and endurable curing potential, with the advantage of mesokinship, and no super-parent advantage.

Key words: ‘YY021’, flue-cured tobacco, curing characteristics, easy curing potential, endurable curing potential, heterosis

SUN Jiping, WANG Yale, LI Lihua, LI Xuejun, LV Wenjun, SUN Huan. Study on Curing Characteristics of ‘YY021’ and Its Heterosis[J]. Chinese Agricultural Science Bulletin, 2024, 40(9): 42-47.

Figures/Tables 7

References 21

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部位	品种	变黄时间/h	变褐时间/h	易烤性	耐烤性
上部烟	YY021	112±13.86	88±13.86	较差	较好
	MSY106	120±0.00	88±13.86	较差	较好
	LY1306	112±13.86	80±13.86	较差	较好
中部烟	YY021	104±13.86	88±13.86	中等	中等
	MSY106	120±0.00	32±13.86	较差	较差
	LY1306	104±13.86	40±13.86	中等	较差
下部烟	YY021	80±13.86	72±0.00	中等	中等
	MSY106	96±0.00	48±0.00	中等	较差
	LY1306	88±13.86	48±0.00	中等	较差

部位	品种	变黄时间/h	变褐时间/h	易烤性	耐烤性
上部烟	YY021	112±13.86	88±13.86	较差	较好
	MSY106	120±0.00	88±13.86	较差	较好
	LY1306	112±13.86	80±13.86	较差	较好
中部烟	YY021	104±13.86	88±13.86	中等	中等
	MSY106	120±0.00	32±13.86	较差	较差
	LY1306	104±13.86	40±13.86	中等	较差
下部烟	YY021	80±13.86	72±0.00	中等	中等
	MSY106	96±0.00	48±0.00	中等	较差
	LY1306	88±13.86	48±0.00	中等	较差

品种	烘烤过程中水分含量/%			失水速率/(g/h)		失水均衡性
品种	0 h	48 h	72 h	0~48 h	48~72 h	失水均衡性
MSY106	78.23 aA	67.82 aA	56.20 cC	0.86	0.96	0.90 cC
LY1306	78.03 bAB	67.78 abA	57.46 aA	0.85	0.88	0.96 aA
YY021	77.94 bB	67.66 bA	56.94 bB	0.85	0.91	0.94 bB

品种	烘烤过程中水分含量/%			失水速率/(g/h)		失水均衡性
品种	0 h	48 h	72 h	0~48 h	48~72 h	失水均衡性
MSY106	78.23 aA	67.82 aA	56.20 cC	0.86	0.96	0.90 cC
LY1306	78.03 bAB	67.78 abA	57.46 aA	0.85	0.88	0.96 aA
YY021	77.94 bB	67.66 bA	56.94 bB	0.85	0.91	0.94 bB

品种	叶绿素含量/(mg/g)		叶绿素降解速率/(%/h)
品种	0 h	72 h	叶绿素降解速率/(%/h)
MSY106	1.70c	0.32b	1.13a
LY1306	2.26a	0.45a	1.11a
YY021	1.95b	0.41a	1.09a